Descriptions of New and Noteworty Gastropoda from Western Pacific and Indian Oceans

Descriptions of New and Noteworty Gastropoda from Western Pacific and Indian Oceans

By

Tokio SHIKAMA*

On February, 1975 the writer during )ouney in Taiwan could gain some In interresting shells for study from Mr･ Chu Sham Chiang in Tainan･ 1976- 77 the writer also could have the chance to study some noteworthy shells from Mrs. T. OISHI in Nagasaki and Mr･ S･ HAYASEI in Mikawa-Isshiki･ The

former w･ere brought by丘shermen from East-South China Seas and the latter

were from off Paci丘c coasts of SouthⅦestern Japan. The writer has been keeplng SOme､unknown shells offered from Mr･ K･ NAKAYASU in Kugenuma, Fujisawa, Mr. H. MuRAKAMI in Osaka and Mr･ M･ SuzuKI in Tokyo, etc. These comprlSe this paper. Here the writer extends his cordial tbanks to these lady and gentlemen for their kindness and generoslty･ Also he wishes to express his sincere thanks to Dr･ T･ HABE and Mr･ K･ OzAKI for different

kinds of help and suggestion during the course of this study･

Entemnotrochus urashima SHIKAMA et OISHI, SP. nOV. ウラシマオキナエビス(節)

(Pl. 1,丘gs. 1a, b, 2, texト丘g. 1)

I)escription: Shell small to medium sized compared with rumPhii, rather thick and like the latter in general outline but splre higher than that of it･ shell trochiform with 9 volutions of teleoconch. Protoconcb small, smooth, light yellow and with 1.5 volutions. Slit narrow and very deep, terminated at a point Just OppOSits side of outer lip of aperture along last wborl･ Selenizone carries many丘ne spiral striations. Shoulder of whorl rather angu- lated just above selenizone. Snture deep. There are runnlng many丘ne splral striations and axial ridges which run oblique to selenizone, hence surface of whorl cancellated. Umbilicus open, narrow, very deep and touching protoconch･ columella thin and straight. Fasciole tolerably large, depressed and with many growth lines. Base of last whorl smooth,flat and sometimes nacreous layer exposed. Types: Two shells stored in the writer's collection, presented by OISIiI; larger shell 97･8mm high and llOmm vide; smaller one 76･9mm high and 97.2 mm wide. Locality: East China Sea, associated with rumPhii.

*地学教室(°ept. of Geology). 10 T. Sf-JIKAMA

Text一点g. 1. Spiral ridges of penultimate whorl, shown in the lower. Right: urashima, ×1.5 nat. size. left: rumphii, ×1.7 nat. size.

Remarks: This species is rather similar to rumPhii in shell construction and genral outline but is distinguished from it by relatively higher spire, more yellow colouration and cancellated surface of whorl, etc.

Margarites (Pupillaria) australis StIIKAMA et CHIANG ミナミスヂマキュビス(節)

(Pl. 2,丘gs. 1a, b)

Description: Shell large sized as Margarites with relatively low spire. Protoconch carries l･5 volutions and relatively small sized. Teleoconch has 3 Shoulder volutions･ not ang･ulated and suture not deep･ Spiral ridges many, 血e and weak･ Umbilicus deep and small･ Aperture large with thick inner

lip･ Inner surface unlustrous, light pinkish white to greyish white. Nacreous layer lustrous much while surface layer very thin, pinkish white to greyish white. IIolotype: shell 25Amm wide and 20.8mm high, stored in the writer's collection, presented by CHIANG. Locality: South China Sea, gained by丘sberies in Kaoshung, Taiwan. Remarks: In general outline, colour pattern and spiral ridges, M. (P.)

PuPillus GouLD is well liked but is distinct by smaller size, relatively higher deeper spire, suture and by less or stronger spiral ridges. M. (P.) sordida M･ (HANCOCK) and cinerea CouTHONY are Separated by much higher spire and less spiral ridges･ M･ groenlandicusCIIEM.･ may be near this species in general New and noteworty Gastropoda from Western Paci丘c and lndian Oceans ll outline and spiral ridges but is distinct by thinner shell and less splral ridges･ In shell structure and large size this species may be unlque among MARGARITES･

Solafiella (Microgaza) opalina SHIKAMA et HAYASHI, Sp. nOV･ オパールシダタミ(新)

b, (Pl. 2,丘gs. 2a, c)

Description: Shell small sized, thin, trochiform with 4 volutions of teleoI low, conch. Protoconch small and round, with 1.5 volutions. Spire with very smooth whorls which are light reddish brown with white tint, lustrous and iridescent･ Sutre deep and subsutural band depressed with a rim of small tubercles of torturous arrangement. Numerous丘ne growth lines visible on whorl surface. Shoulder rounded. Base rather丑at thougha little inflated･ Umbilicus deep and narrow. Fasciole narrow and gently curved with a sharp edge with many small nodules of touturous arrangement･ Axial striations run from the edge on basal surface. Aperture subrhombic with sharp inner and outer lips.

Types: Three shells stored in the writher's collection, presented by HAYASHI; largest one 8.9mm high and 13.3mm wide. Locality: 0ffsouthwestern Honshu. One shell was gained from off KashiwaJlma island, Toga; two shells are from offKushimoto, Kii. 450m deep･ Remarks: This species is near S. nuda DALL from Northeastern Pacific in general outline, construction of shell, iridescent whorl surface, etc. but is distinct from it by nodulous edge of fasciole, nodulous rim of subsutural band and by a little more angulated shoulder･ Atlantic species, rotulla DALL which is a type species of microgaza, is also allied to this species but is distinct from it by whitish grey colouration.

Calliostoma (Tristichotrochus)hayashii, sp. nov. -ヤシエビス(新)

(Pl. 2,丘gs. 3a, b)

Description: Shell medium to large sized as Calliostoma, trochoid, tur- rated, not thick and with 6 volutions of teleochonch･ Protoconch small, smooth, deep･ Whorl dark brown and with 1.5 volutions. Spire high and suture white to light yelloⅥ7ish brown with angnlated shoulder･ There are runnlng many Four distinct spiral ridges consisting of mumerous smau tuberclesI prlmary run between first ridges run above peripheral ridge･ Three secondary ridges latter and second prlmary ridges, also between the and third prlmary ridge between fourth while one secondary ridge visible third and primary ridges, run also bet∇een the latter and peripheral ridge･ Nine secondary ridges between suture and first prlmary ridge･ Axial colour bands run from stlture brown dotts･ Base to shoulder touching peripheral edge and becomlng same distance･ rather flat, slightly convex with spiral threads arranged with 12 T. SHIKAMA

Columella narrow, pure white and umbilicus closed. Aperture rhombic with thin outer lip and nacreous inner surface. Ⅱolotype: Shell 33･2mm high and 34.7mm wide, stored in the writer's collection, presented by HAYAStII.

Locality: 0ffKushimoto, Kii, 350m deep; quite rare in occurrence.

Remarks: This unlque Species is allied to unicum DuNKER in sculpture of base but is distinct from it by larger size, more distinct primary ridges above periphery and by nodulous spiral ridges between suture and shoulder. Species kiiensis IKEBE Or COnSOr LISCHKE may be near it in nodulous splral ridges and angulated shoulder but are distinct from it by smaller size and sculpture of base･ At any rate this species belongs to the groups of consor, kiiensis-unicum.

Minolia midu)ayensis, sp. nov.コガネシダタミ(新)

(Pl. 2,丘gs. 4a, b, 5a, b)

Description: Shell small sized, thick, trochoid, and with 5 volutions of teleoconch･ Protoconch small, round and with 2 volutions. Suture deep and

subsutural band distinctly depressed, smooth and with numerous axial brown StriationsI Surface of whorl lustrous, creamy yellow to white. There are runnlng many Spiral ridges wbicb 5 on penultimate whorl and uppermost ridge angulated, with numerous axial crenulation. Columella white, thin and Umbilicus twisted･ deep and nartow･ Aperture subquadrate with thick and sharp outer 一ip. inner surface of it nacreous. Ⅱolotype: Shell 14･8mm high and 13.7mm vide, stored in the writer's collection, offered by SuzuKI. Loeality: Sea from Bomin lslands to Midway Islands.

Remarks: This species is near Punctata A. ADAMS but is distinct from it by sbsence of tubercles on basal spiral ridge and by broⅥTn axial blotches on whorl surface, etc.

Galeoastraea formosana, sp. nov.タカサゴカンス(新)

(Pl. 2,丘gs. 6a, b)

I)escription: Shell small sized, trochoid with 4 volutions of teleoconch.

Suture There is a distinct shallow. edge between base and shoulder of wbor】. has Last whorl 6-9 spiral ridges which are nodulous･ Edge carries sharp tubercles which are trlgOnal, projected exterio-downward and overlapped surface of suceeding whorl. Shoulder of whorl gently curved. Surface of light whorl violetish brown with irregular blotches of brownish black colour- ation. Base of whorl also bas axial blotches of brownish black colouration. Callus thin while columella thick, white and twisted. Aperture suboval with nacreous inner surface. Outer lip thin. New and noteworty Gastropoda from Western Paci丘c and lndian Oceans 13

Ⅱolotype: Shell 24･8mm high and 26.2mm w!de, stored in the writer's collection, offered by NAKAYASU. Localitry: 0ffTaiwan.

Remarks: This species is rather near Persica DALL Or aSteriana DALL but is distinct by axial colour blotches of base and by colour blotches on shoulder of last whorl･ Peripheral tubercles of last whorl of this species is less in both than the species, while spiral ridges of whorl have more nodules in this species than in them.

Serpuorbis (s･s･)yokojima, sp. nov.ヨコジマ-ビガイ(新)

(Pl. 3,丘gs. 1a, b)

I)escriptoin: large Shell sized as Serpuorbis, attached to the other shells with spire side,･ attaching surface flat and shoulder Of last whorl sharply･ Protoconch broken･ angulated･ and spire Coiling of 3-4 volutions extended to -one direction along atta･ching surface. Ventral surface of last whorl in- flated, convolute, white and with many longitudinal striations･ Median longl- tu､dinal striation angulated or feebly keeled･ There are many transverse brown striations runnlng Parallel with lips of aperture, white and very lustrous. IIototype: shell 46･7-53･6mm in diameters, 17.5-24.5mm in diameters of aperture, stored in the writer's collection, offered by NAKAYASU. Locality: Philippine Islands. Remarks: This unlque Species is clearly distinguished from the other species of Serpuorbis by many transverse brown striations.

Murex tunghaiensis SHIKAMA (s･s･) et OISHI, Sp. nOV.トウカイツブリ(新)

(Pl. 2,丘gs, 7a, b)

Deseription: Shell medium sized, fusiform, turrated with 8 volutions of teleoconch･ Protoconch very small and suture deep･ Varix distinct, rugose thick a and with short shoulder spine; scalloped margln且ne and delicate. Axial between last ribs v･arices of whorl 516 in number, relatively weak and not angulated･ Numerous violetish brown radial striations run parallel to each other on whorl. Two-three spines on long siphonal tube relatibely Aperture sbort･ oval and parietal wall white and eminent･ Distal portion of sipbonal tube carries 3 brown blotches. Ⅱolotype: Shell 81･7mm high and 31.2mm Ⅶide, stored in the writer's collection, presented by OISHI.

Locality: East China sea. Remarks: KIRN Species kiiensis and elensis DALL are liked in general

but are distinct by less outline axial ribs and coarser lamination of scalloped margin Of varix･ M･ rectirostris SowERBY and M. gallinage SowERBY are far from distant this species by stouter construction of shell. 14 T. SHIKAMA

chicoreus nobilis, sp. nov.クレナイセソジュ(新)

(pl. 2,丘gs. 9a, b; Pl･ 5,丘g･ 1)

Description･. Shell small sized, thick, pinkish white,fusiform･ turrated and l･5 vith 8 volutions of teleoconch. Protoconch small, round, pink add with volutions. Spire high, narrow with deep suture and angulated shoulder･ varix one largest thick with 13 pinkish red spines on penultimate whorl;first and incurved Two eminently expanded distally･ Spines posteriorly. axial ridges splral between varices nodulous. There are running many sharp striations, red some of which brownish black. Siphonal tube straight, pinkish and with inner deep canal which is very narrow･ Aperture subrhombic with unthick Inner and outer lips. Peristome sharp and pinkish red･ surface of aperture pinkish red and lustrous･ Ⅱolotype: Shell 55･Omm high and 30･2mm wide, stored in the writer's collection, offered by NAKAYASU･ Locality: Off Cebu Island, Philippines･

RerEtarks: This species is near aculeatus LAM-ARCK (?-artemis RADWIN it by between et D'ATTILIO) but is distinct from 2 nodulous axial ridges varices, pinkish red colouration of splneS, Siphonal tube and peristome and In same area Cebu, this by more distinctly developed rami of spines･ the of hence they are species coexists with aculeatus and rossitieri CROSSE, synpatric is rare but species species. In Japan aculeatus occurs commonly, rossitieri this by disappears- Species saulii SowERBY is also distinct from this species larger size, less developed rami of splneS, White peristome, etc･

chicoreus gloriosus, sp. nov.ウタヒメセシジ- (新)

(Pl. 2,丘gs･ 8a, b)

Description: Shell medium sized, thick, beautiful pinkish white and with 2 6.volutions of teleoconch･ Protoconch small･ round, light violet and with deep suture volutions. Spire moderately high, with and angulated shoulder are 5 on of whorl. There are runnl咽many Splral ridges which above on penultimate whorl･ Varix eminent, stout, thick but splneS present Only anterior portion of last whorl･ Two spines along siphonal tube relatively Aperture distinct but not long. Two axial ridges between varices nodulous･ narrow, suboval with thin inner and outer lips. Siphonal canal very slit-like not broad. a也d siphonal tube gently curved･ columella white and Ⅱolotype: Shell 49.1mm highand 24.5mm wide, stored in the writer's

collection, presented by NAKAYASU･ Locality: 0ffCebu Island, Philippines･ LAMARCK Remarks･. This species is near saltatrix KuRODA and aculeatus is distinct from them by in general outline and construction of shell but by be- absence of splneS On Varix shoulder and two nodulous axial ridges New and noteworty Gastropoda from Western Paci丘c and lndian Oceans- 15

tween varices.

Murexiella martini, sp. nov.カセンホネガイ(新)

(Pl. 2,丘gs. 10a, b)

Description: Shell small sized, moderately thick, trocboid, turrated and witb 7 valutions of teleoconch. Protoconch small, white, round and Ⅵ7itb 2 volutions. Spire high and suture deep. Whorl light yellowish brown and carries angulated shoulder. Four spiral ridges of whorl sharp. Varix rela- tively thick with 4 spines which are expanded distally.; uppermost one on whorl largest of them, long, gently curved and distinctly projected upvard. The other 3 spines very ′small, short compared with the uppermost large spine Just mentiond. Two long and a very.short spines visible on penultimate and its preceeding- whorls. Varices run oblique to suture. Aperture suboval wit′b thin outer lip. Columella very narrow and white. Siphonal canal ex- tremely narrow and siphonal tube narrow, pro)ected antero-leftward. Ⅱolotype: Shell 28.1mm bigb and 26.5mm in maximum width, stored in the writer's collection, presented by MARTIN NANG in Cebu via NAKAYASU. IJOCality: 0ffCebu Island, Philippines.

Remarks: This species is near damicornis HEDLEY but is distinct by eminently curved siphonal tube, higher spire and more distinct varices. Species axicornis LAMARCK Or longicornis DuNKER may be near in long spines but are clearly distinct by lower splre, Straight sipho皿al tube and by weaker varix of last whorl, etc.

SiPho (s.s.) aurorae, sp. nov.アケボノツムバイ(新)

(Pl. 3,丘gs. 3a, b)

Deseriptio′n : Shell medium sized, fusiform, turrated, thick and light yellowish white. Spire high with deep sLuture and unangulated shoulder of whorl. There are runnlng many Spiral striae. Brown spiral ridges sharp and thin, dotted vith interspaces of 3-4 spiral striae. Protoconch very small, dark brown and with 2.5 volutions. Aperture fusiform, with thin and sharp outer lip; inner surface white and lustrous. Ⅱolotype: Shell 38.2mm high and 13.7mm wide, stored in the writer's collection, offered by SuzuKI.

Loeality: Smith Band near Midway lsland.

Remarks: Every species of Aulacofusus are distinct from this species by deeper interspaces of- spiral ridges. Manaria is also distinct from,this by distinct axial ridges. Kanamarua is also distinct from this by smooth whorl surface and thin shell. 16 T. S甘IKAMA

EosiPho pygmaeus SHIKAMA et HAYASEI, Sp. nOV.ヒナツムバイ(新)

(Pl. 3,丘gs. 2a, b)

Description: Shell small sized, thin, fusiform, turrated and with 5 volu- tions of teleoconcb. Protoconch small, round and with 2 volutions. Spire bigb with undeep suture and rather round shoulder of whorl. Whorl white with 2 brown spiral colour bands. Fine splral threads about 15 on penulti- mat? whorl･ Columella white, rugose, narrow and 'twisted･ Aperture sub- rhombic carrylng thin outer lip. Types: Three shells stored in the writer's collection, presented by HAYA- SHI. Largest shell 14.3mm high 6.9mm wide. Locality : Edsyu-nada off Daio-zaki Cape, doom deep; qulte rare in occurrence.

Remarks : E. smithi (ScHEPMAN) known from Celebes Sea is allied to this species but is distinct from it by larger size, stouter shell or more rugose spiral ridges, etc.

Phos hayashii, sp. nov. -ヤシトクサバイ(新)

(Pl. 3,丘gs. 4a, b)

Description: Shell small sized, fusiform, turrated and white coloured･ Spire relatively high and with 7 volutions of teleoconcb･ Protoconch small and smooth. Penultimate whorl carries 7 axial ridges which are nodulous and are cancellated by 4-5 spiral striations. Shoulder of whorl angulated･ Aperture lenticular with thick outer lip and deep anterior canal. Denticle of outer lip many and distinct. Ⅱolotype: Shell 21.8mm high and ll.1mm Ⅶ･ide, stored in the writer's collection, presented by HAYASHI. Loeality: Ensyu一皿ada.

Remarks: This species is rather near roseatum HINDS but is distinct by coarser spiral striations, spiral colour bands absent and by more smooth axial ridges, etc.

ML'tra (Tiara) morchii (A. ADAMS) forma taiwanica, mom. nov. SⅠiⅨAMA et CⅢIANG.タイワンフデ(節)

(Pl. 3,丘g. 5)

Description: Shell large, elongate fusiform, turrated and covered by epidermis of dark yellovish brown colour. Spire high‾with deep suture and unin且ated shoulder of whorl. Surface of whorl smooth with distinct spiral grooves which above 6 on penultimate whorl. Protoconch small, round and with 2 volutions. Teleoconcb has 8 volutions. Columella white, lustrous and twisted with 5 strong folds. Siphonal canal wide and deep. Siphonal tube New and noteworty Gastropoda from W‾estern paci丘c and indian Oceans 17

twisted, bent rightward. Posterior canal narrow and deep.

Specimen described: Shell 113.5mm high and 26.9mm wide, stored in the writer's collection presented by CEIANG. Locality: South China Sea.

Remarks: This forma belongs to species morchii A. ADAMS and distin- guished from the Japanese forma by more spiral grooves, more slender spire and by more smooth whorl surface, etc. The Japanese form of morchii has been known as not common species in Japan although stored by many col- lectors, hence the difference between the both forms may be slgni丘cant to write here.

ML'tra (Tiara) abyssicola SHIKAMA et HAYASIiI, Sp. nOV. ワダツミイトマキフデ(新)

(Pl. 3,丘gs. 6a, b)

Descriptioh: Shell small sized, thich, fusiform, slender and witl1 7 volu- tions of teleoconch. Protoconch small, round, violetish brown and with 2 volutions. Spire high and suture not deep. Whorl white with brown primary

4 on One spiral ridges which penultimate whorl. -white secondary spiral ridge visible betⅦeen primary ridges. There are runnlng distinct white axial threads, hence whorl surface becomlng cancellated. Five columella folds distinct and white. Aperture narrow. Types: Two shells stored in the wtiter's collection, presented by HAYASHI. Larger shell 19.6mm high and 6.4mm wide.

Locality: Ensyu-nada, off Daio-zaki Cape, 100-150m deep. It may be noteworthy that this species is inhabiting ln the deepest bottom among the Praestantissima group.

Baryspira utopica aureocallosa SEIKAMA et OISHI, subsp. nov.コガネボタル(節)

(Pl. 3,丘gs. 7a, b; Pl. 5,丘g. 2)

Description: Sheu medium sized, thick and oval in outline. Spire not high and covered by thick callus. Protoconch small, violetish brown and pro- jected acutely posteriorward. Dorsal spire callus light brown, lustrous while ventral one white to light yellowish brown and pad-like. A shallow splral groove runs on anterior portion of dorsal spire.callus. Surface of last whorl smooth, light reddish. brown and with numerous growth lines. A white spiral thread runs between dorsal spire callus and surface of last whorl. Fasciole light brown with an anterior spiral thread and two white posterior splral thread which carry a white spiral band between them. Columella vhite, thick, twisted and carries 4 weak folds. Aperture lanceolate with thick and smooth outer lip. inner surface of aperture reddish brown and lustrous. 18 T. SIIIKAMA

Ⅱolotype: Shell 40.3mm high and 18.1mm wide, stored in the writer's collection, presented by OISHI.

Locality: East China Sea near off West Kyushu.

Remarks: This subspecies is near utoPica KuRODA (MS) but the spire callus of it is beautiful violet coloured, hence aureocallosa may be regarded to a subspecies of utoPica. Species utoPica (マボロシリュウグウボタル) ☆as hitherto known from o庁Kagoshima Prefecture and as quite rare in occurrence.a utopica Parentalis (KuRODA MS) SHIKAMA, 1964 ((シラガボタル(鹿間) pl. 3,丘gs. 8a, b)) is commonly known from the Pleistocene Kikai Group of Kikai lsland, Amami-Oshima Islands. It is characterized by extremely thick callus of spire, distinct anterior splral groove of dorsal spire callus and by angulated shoulder of last whorl, etc. In 1964, it was illustrated by the writer under the KuRODA's ** name (MS)*,

Gemmula rosario SHIKAMA et HAYASHI, Sp. nOV.コゲジュズカケクダマキ(新)

(Pl. 3,丘gs. lla, b)

Deseription: Shell medium sized, thick, elongate fusiform, turrated and with 10 volutions of teleoconch. Protoconch small, globous, brown, smooth and vith 2 volutions. Spire very high, narrow and with undeep suture. Whorl white with brownish tint. Four primary spiral ridges on penultimate whorl brown and sharp. First prlmary One most eminent, second one tortulous or gemmate; third and fourth ones relatively weak. About 20 spiral ridges visible on last whorl, of which third to sixth ridges run on shoulder of i‾t. Third and fourth ones correspond peripheral ridges. Axial striae runnlng oblique to spiral ridges. Posterior sinus deep, narrow, V-shaped and touching Second Columella narrow twisted. Sipbonal tube long and splral ridge. land narrow. Aperture subrhombic with thin outer lip; inner surface of aperture white and lustrous.

Ⅱolotype: Shell 44.6mm high and 12.4mm wide, stored in the writer's collection presented by HAYASHI, Locality: Kii Channel, Japan, loo-150m deep.

Remarks: This species may be nearest murrayi PowELL but is distinct by narrower splre, Shorter siphonal tube and by stronger third-post-third spiral ridges.

Turricula (Comitas) ensyuensis SHIKAMA et HAYASEI, sp.nov.エンシュウイグチ(新)

(Pl. 3,丘gs. 9a, b, 10a, b)

* Index Fossils of Japan (Asakura), p. 112, pl. 33,丘g. 7. ** As Parentalis is gevin for a fossil species as a subspecies of a recent species be utoPica, the name Parentalis may treated as a different species name or a form name of utoPica. Paci丘c Indian Oceans New and noteworty Gastropoda from Western and 19

Description: Shell small to medium sized, thin, fusiform and turrated･ Protoconch spire very high and with 8 volutions of teleoconch･ small, white lustrous and with 2 volutions. Whorl light yellowish brown, carries many splral striations･ Suture rather deep and shoulder angulated with a white splral colour band･ Posterior sinus shallow, wide and V-shaped･ Selenizone

near Axial on wide, depressed and lies very suture･ ridge nodulous shoulder･ columella narrow, white, lustrous and twisted･ Aperture narrow and lanceo- 1ate. Siphonal tube long and projected anteriorly with deep canal･ Types: Two shells stored in the writer's collection presented by HAYASHI ; type A, 46･3mm high and 12mm Vide; type B, 43･7mm highand 13･6m wide･ Locality: Ensyu-nada, gained by丘sheries of Mikawa-Issiki; living in a same area associated with Fulgoraria (Psephaea) conccina corrugata SHIKAMA although much rarer than it･ Remarks: There are 2 types A and B; A has distinct nodules of shoulder

is near kamakurana PILSBRY and B has relatively weak ones･ This species but is distinguished from it by less and more distinct nodules of shoulder band it･ and by white spiral of

RectiPlanes (Rectisulcus) hayashii, sp. nov. -ヤシイグチ(節)

(Pl. 3,丘gs･ 12a, b)

Description: Shell small sized, thin, fusiform, turrated and with 7 volu- tions of teleoconch. Protoconch very small, white, lustrous and with 2 volu- tions. Spire high with rather deep sutures and distinct subsutural bands distinct it which are wide. Whorl has many spiral striations and surface of brown･ Shoulder covered by thin lustrous epidermis of light yellowish mode- Axial beloⅥ7 rately angulated and selenizone relatively wide･ ribs nodulous Aperture Shoulder. columella narrow, white and twisted. suboval with thin

outer lip. Anterior canal deep and narrow. Types : Two shells stored in the writer's collection, presented by HAYA- SEI ; larger one 31.4mm high and ll.5mm wide.

IJOCality: Ensyu-nada, gained by fisheries of Mikawa-Isshiki ; very rare･ Remarks: This species is rather near motojLmai HABE in spiral striations but is distinct from it by nodules of shoulder, axial ridges of whorl and by

relatively higher splre, etC.

conus (s.s.)keatiformis SHIKAMA et OISHI, SP. nOV.チャガス1)イモモドキ(節)

(Pl. 4,figs. 1a, b; pl･ 5,fig･ 7)

Description: Shell large sized, thick, conical with almost straight sides･ Suture spire not highwith 10 volutions and many fine spiral striations･ lustrous, shallow and surface of last whorl smooth, white with regular brown blotches arranged in 3 relatively broad bands and the other 7 narrow bands･ 20 T. S上iIKAMA

Holotype: Shell 62･6mm high and 31.Omm wide, stored in the writer's collection, presented by OISHI.

Locality : East China Sea.

Remarks : Conus (Phasmaconus) keati SowERBY Of Indian Ocean is rather allied to this species in general outline and colour pattern but in distinct by more distinct spiral grooves of anterior portion and by more round shoulder. C･ (Pionoconus) stramineus is also clearly distinguished from this by different colour pattern and by more spiral grooves.

Conus (Rhizoconus) paradiseus, sp. nov.ゴクラクイモ(新)

(Pl･ 4,丘gs. 2a, b; pl. 5,丘g. 6)

Description: Shell medium sized, thick, stout, conical ; sides almost straight though a little curved; spire not high with 8 volutions of teleoconch. Proto- conch very small･ Suture shallow and subsutural band distinctly depressed ∇ith 3-4 spiral threads･ Shoulder of wharユ sharply angulated. Surface of last whorl smooth, light reddish brown and with丘ne ■numerous striations; it has anterior portion of 14 spiral threads dotted with white and black spotts. Two spiral colour bands run on middle portion of last whorl composlng Of

white and black spotts. There are black blotches on shoulder of last whorl. Spire has axial colour bands of white and black. Fasciole white, narrow and Aperture twisted. narrow with thin outer lip; inner surface milky white. Ⅲolotype: Shell 58.1mm bigb and 30.9mm wide, stored in the writer's collection, offered by NAKAYASU. Loeality: Indian Ocean; very rare.

Remarks: This beautiful species may be near aduertex GARRARD but is distinct from it by more depressed subsutural band, more distinctly keeled shoulder, thick brown colouration of last whorl with bl･ack blotches and by less colour bands of it, etc.

Co-iluS (Phasmoconus) ambaroides, sp. nov.カニンイモ(新)

(Pl. 4,丘gs. 3a, b;pl. 5,丘g. 3)

Deseription: Shell small sized, conical and with slightly curved sides. Spire not high with 6 volutions. Suture not deep and spiral striations distinct. Surface of last whorl smooth, lustrous, white and with beautiful blotches of orange colour. There are running about 20 spiral colour striations of brown and white dottlng･ Anterior tip of last whorl carries about 20 spiral grooves. Aperture narrow and inner surface white with light violetish tint. Spire also carries brown regular blotches.

Ⅱolotype: Shell 33.2mm high and 15.8mm wide, stored in the writer's collection, offered by■H. MuRAKAMI. Locality: Philippines. New and noteworty Gastropoda from Western Paci丘c amp lndian Oceans 21

Remarks: In general outline and snrface sculpture, C. radiatus GMELIN is nearest this species but is distinct by colour pattern of last whorl and spire.

Textilia dusaueli benten SHIKAMA et OISHI, Subsp. nov. ベンテンイモ(小菅, 1971)

(Pl. 4,丘gs. 4a, b;pl. 5,丘g. 9)

Description: Shell large sized, thick, elongate conical, with gently curved

both sides and 8 volutions of teleoconch. Protoconch very small, pinkish white and with 2 volutions. Spire high with Tether deep suture and angulatee shoulder of whorl. There are running many spiral striations. Surface of last whorl very smooth, 1ustrotlS and yellowish orange. About 17 spiral bands of brown colour rather narrow and carry white of light colour dotting. Three relatively wide bands of light brown run on shoulder, middle and anterior portions of last whorl. Several axial white threads run cancellated with many spiral broad and narrow colour bands. Several axial brown threads run on spire and shoulder of last whorl. Fasciole Ⅶhite, thick and twisted. Aperture deep and narrow with wide anterior- and deep posterior canals･ Inner surface of aperture white with light orange tint. Holotype: Shell 78.8mm high and 29.5mm wide, stored in the writer's collection, presented by OISHI. Locality: 0ffSenkaku Island, East China Sea; extremely rare.

Remarks: In 1971, this beautiful species Ⅵ7aS illustrated by S. KosロGE but not described. His shell has 3 more distinct brown spiral bands but its axial white threads of last whorl is rather obsolete. This subspecies clearly belongs to dusaueli H. ADAMS, 1872, a famous rarest cone species from

Mauritius lsland but is distinguished from it by lower spire, more distinct brown spiral band or shoulder, wider axial brown threads of spire, distinct white axial threads of last whorl, e上c. According to DANCE, SowERBY Wrote that the Mauritius shell was gained from stomach of丘sh living in 60 fathoms.

Textilia bullatus (L.) forma bongo SHIKAMA et OISHI, mom. nOV. ショウジョウナツメイモ(節)

(Pl. 4,丘gs, 5a, b;pl. 5,丘g. 5)

Description: Shell medium sized, thin, nearly ellipsoid and with gently curved both sides. Spire not high with 7 volutions of teleoconch. Protoconch small, round, light violetish red and with 2 volutions. Suture rather deed and subsutural band weakly depressed. Last whorl smooth, orange red with 3 broad thick red spiral bands. A narrow red splral band runnlng between broad ones. White triangular spotts dotted sporadically. Fasciole narrow, light orange coloured and t∇isted. Aperture narrov with thin outer lip; inner surface thick orange red with yellow- or milky white anterior rim. 22 T. SHIKAMA

Specimens described: Shell 64.Omm highand 28.2mm wide, stored in the writer's collection, offered by NAKAYASU. Another one 56.8mm highand 25.0 mm wide, stored in the same collection, presented by OISHI. IJOCality: East China Sea.

Remarks: This form is characterized by thick orange red colouration of last whorl, inner surface or fasciole･ According to MARSH and RIPINGALE, the type of vivid red colouration is known from off Admiralty Islands, while

orange type is distributed in the mid. Paci丘c. This form may belong to thier Admiralty group*.

Asprella (?) oishii, sp. nov.オオイシイモ(新)

(Pl. 4,丘gs. 6a, b)

Description: Shell small sized, elongate conical with slightly curved both Spire high sides･ relatively with 8 volutions･ Suture deep and whorls stepped with angular shoulder and spiral striations. Surface of last whorl rather smooth, white, carrylng about 22 spiral grooves with relatively broad inter- There are spaces. runnlng STnall irregular blotches of reddish organg colour. last inner■ Anterior tip of whorl and surface of anterior canal violetish red. Ⅱolotype : Shell 31.6mm high and 13.1mm wide, stored in the writer's collection, presented by OISHI. Loeality: East China Sea.

Remarks: Conus kikaiensis PILSBRY may be near this species but is dis-

tinct by pattern of blotch colouring･ Hermes granulatus (L.)also may be liked this in reddish colouring but is clearly distinct by surface sculpture. H. alabasteroides SHIKAMA is distinguished by the same characteristics. Asprella kuroharai HABE may be near in general outline and surface sculpture but is distinct by colour pattern.

Referen(:es selected

T･ 1974･ ABOTT, American Seashells. Ⅴ. N osl-RANIく(New York). M･ AzuMA, 1972･ Descriptions of Four New Gastropoda from South China Seal Jap. Jour. Mal., vol. 31, no. 2. CERNOHORSIくY, W･0･ 1967･ Marine Shells of the Paci丘c, rev. ed. Pacif. Pub. (Sydney). 1972. Ibid･, vol. 2. Pacif. Pub. (Sydney). 1976. The Mitridae of the World, pt. 1. the subfamily Mitrinae lndo.Paci丘c

Mollusca, vol. 3, no. 17. Co又, L.R. 1960. Gastropoda in Treat. Invert. Pal., Mollusca I. Geol. Soc. Amer.

CROSS, E.良. 1971. The Case History of the Pleurotomariids. Hawaiian Shell News, vol. 19, no. 8. DANCE, S.P. 1969. Rare Shells. Univ. Calif. Press.

* Forma nomination may be useless in taxonomy but it may be useful for collectors. Also it may not be unsigni丘cant that this form became to be known as distributed from Admilarty to East China Sea. New and noteworty Gastropoda from Western Paci丘c and lndian Oceans 23

HABE, T. and KosuGE, S. 1966. Shells of the World in Colour, γol. 2. The Tropical Paci丘c. Hoikusha (Tokyo). HIGO, S. 1973. A Catalogue of Molluscan Fauna of the Japanese lslands and the Adjacent Area (Nagasaki). IKEBE, N, 1930. A Catalogue of Japanese Calliostoma･ Venus, vol. 2, mos. 2-3. 1942. Trochid Mollusca Calliostoma of Japan, fossil and recent. Jay. Jour. Geol. Geogr., VOT. 18, no. 4. KoHN, A. 1968. Type Specimens and Indentity of the described Species of Conus IV, The Species Described by HwASS, BRUGUIERE and OLIVI in 1972. Jour. Linn. Soc. (Zool.), 47. 313･ KosuGE, S. and SuzuKI, M. 1969. Eniemonotrochus rumphii (ScEiEPMAN, 1879) newly collected from the South China Sea. 丁ap. Jour. Mal. vol. 27, no. 4.

1971. Pacif. News, no. --, Unique Shell of the World. Shell spec. KuRODA, T. 1955. On the Japanese Species of Conus (Ⅰ). Jap. Jour. MalリVOl. 18, no. 4. 1956. Ibid. (ⅠⅠ).丁ap. Jour. Mal., γol. 19, no. 1. MARSH, ∫.A. and RIPPINGAILコ, 0.H. 1964. Cone Shells of the World. Jacarande

(Brisbane) I OKUTAN王, T. and BABE, T. 1975. Illustrated Monograph for Mid.･high School Students, Mollusca, I (Gastropoda). Gakken (Tokyo). OyAMA, i. 1966. On Living Japanese Turridae (Ⅰ). 丁ap. Jour. Mal. γol. 25, no. 1. PowELL, A.W.B. 1964. The Family Turridae in the lndo･Paci丘c, pt. 1. Indo･Paci丘c Mollusca, vol. 1, no. 5. 1967. Ibid., pt. 1a. Loc. °it. γol. 1, no. 7. SHIKAMA, T. 1961. On Mikadotrotrochus salmiana found offChoshi, East Japan. Jap. Jour. Mal., vol. 21, no. 4. 1963. On Some Noteworthy Marine Gastropoda from Southwestern Japan.

S°i. Rep. Yob. Nat. Univ., sec. 2. no. 10.

1970. Ibid., (ⅠⅠ).Loc. °it., no. 16. 1971. Ibid. (ⅠⅠⅠ).Loc. °it., no. 18. 1973. Description of New Marine Gastropoda from the East and South China Seas. Loc. °it., no. 20. SHUTO, T. 1999. Taxonomical Notes on the Turrids of the Siboga-Collection originally described by M.N. ScHEPMAN, 1918 (pt. i). Jap. Jour. Mal. γol. 28, no. 2. 1970. Ibid., (pt. 2). 丁ap. Jour. Mal., vol. 29, no. 2.

1975. Notes on type Species of Some Turrid Genera Based on the Type

Specimens in the British Museum (N.E.). Jap･ Jour. Mall, γol. 33, no. 4. SowERBY, G.B. 1882. Thesaurus Conchylioum, vol･ 5･ WENZ, W. 1961. Gastropoda, teil 1, Prosobranchia･ Borntrager (Berlin). YEN, T.C. 1941. A Review of Chinese Gastropoda in the British Museum. Proc. Mal. Soc. London, vol. 24, pp. 170-290.

▲ l Explanation of Plate 1

(all xO.6) Figs1 1a, b･ Entemnotrochus urashima SHIKAMA et OISrlI, sp. nov. Fig. 2. Ibid. 3a, b･ Figs･ Entemnotrochus rumphii ScHEPMAN. T. SHIKAMA See. ⅠⅠ,Plate 1

転変

Ozaki Photo. Explattation of Plate 2

(all natural size unless otherwise stated)

Figs. 1a, b. Margarites (Pu?illaria) australis SflIKAMA et CHIANG, Sp. nOV. Figs. 2a, b, c･ Solariella (Microga2a) 0?alina SIIIKAMA et HAYAS甘Ⅰ, Sp. nOV. ×2. Figs. 3a, b. CaZliostoma (Tristichotrochus) hayashii, sp. nov. Figs. 4a, b, 5a, b. Minolia midwayensis, sp. nov. x2. Figs. 6a, b. Galeoastraca formosana, sp. nov. Figs. 7a, b. Murex (s.s.) tunghaiensis SHIKAMA et OISI叫Sp. nOV. Figs. 8a, b. Chicoreus gloriosus, sp. nov. Figs. b. 9a, Chicoreus nobilis, sp. nov. Figs. lo乱, b. Murexiella martini, Sp. nov. T. SHIEAMA See. ⅠⅠ,Plate 2

Ozaki Photo. Explanation of Plate 3

(all natural size unless otherwise stated)

Figs. 1a, b. Ser?uorbis (s.s.) yokojima, sp. nov. b. Figs. 2a, EosiPho Pygmaeus SHIKAMA et HAYASFI, sp. nov. ×2. Figs. 3a, b. Shipho (s.I.) aurorae, sp. nov. Figs. 4a, b. Phos hayashii, sp. nov. Figs. 5. Mitra (Tiara) morchii (A. ADAMS) forma taiwanica SHtKAMA et C7iIANG. Figs. 6a, b･ Mitra (Tiara) abyssicola S=IKAMA et HAYASrlI, Sp. nOV. ×2. 7a. b Figs. Barys?ira utopica aureocallosa SHtKAMA et OISrn, subsp. nov. Figs. 8a, b Baryspira ♪arentalis KuRODA et SHIKAMA. Figs. 9a, b Turricula (Comitas) ensyuensis SHIKAMA et HAYASHl, sp. nOV. type A. B. Figs. 10a b Turricula (Comiias) ensyuensis SHIKAMA et fIAYASHI, sp. noV. type Figs. lla b Gemmula rosario S=zKAMA et HAYASI-I, sp. noV. Figs. 12a b Recti?lanes (Rectisulcus) hayashii, sp. nov. T. SHIKAMA See. II, Plate 3

Ozaki Photo. ExphnatioA Of Plate 4

(all natural size)

Figs. 1a, b. Conus (s.s.) keatiformis S日IKAMA et OIStlI, sp. nov. Figs. 2a, b. Conus (Rhizoconus) ♪aradiseus, sp. nov. Figs. 3a, b. Conus (Phasmaconus) ambaroides, sp. nov. Figs. 4a, b. Textilia dusaveli benten SHtKAMA et OISFI, subsp. nov. Figs. 5a, b. Textilia bullatus (L.) forma j?ongo SH[KAMA et OISHt. Figs. 6a, b. AsPrell (?) oishii, sp. nov. T. S甘Il(AMA See. II, Plate 4

Ozaki Photo. Explan&tion of Plate 5

(all about natural size unless otherwise stated) F g.1 Chicoreus nobilis, sp. nov. F Barys?ira g.2 uto♪ica aureocallosa SflIKAMA et OIS甘Ⅰ, subsp. nov. ど g.3 Conus (Phasmaconus) ambwoides, sp. nov. F g.4 As?rella (?) oishii, Sp. nov. F g.5 Textilia bullatus (L･) forma ゃongo S=IKAMA et OISHI, subsp. nOV. ど g.6 Comus (Rhizoconus) 9aradiseus, sp. nov. F Conus g.7 (s･s･) keatiformis SHIKAMA et OISHI, sp. nov. ど Entcmnotrochus g.8 urashima S旺IKAMA et OISI叫Sp. nOV. ×4/7. ど Textilia g.9 dusaveli bcnten S=lKAMA et OISHI, subsp･ nov･ T. SEIKAMA Sec. ⅠⅠ,Plate 5