Murphy & Rodda

JOURNAL OF PALEONTOLOGY, VOL. 34 PLATE 102 Murphy & Rodda MOLLUSC A OF CRETACEOUS ROCK, CALIFORNIA 841

deal of variation in the inflation and spire bigny), the type of Trajanella (Cossmann, height even in specimens from a single lo- 1909, pi. 2, figs. 16-18), but is more inflated cality, but the growth line characteristics and has a lower spire. Some specimens of are the same in all specimens. Anderson "Acteonina,> bellavistana Anderson and "A." (1958, p. 156) has recognized "Acteonina," berreyessaensis Anderson appear to be very californica Gabb from Thompson Creek, similar to the genotype. Yolo Co., and chose a specimen from this Large, accurately located stratigraphic locality as the "neotype" of A. californica collections will be necessary to obtain a Gabb. Anderson (1958, p. 152-159) has also more satisfactory solution to the taxonomic described seven new species: A. ursula and problem in this group. At present we do not A. ursulagorda from the same locality on feel that any of the described species can be Bear Creek, on the east side of the Sacra- used as an indication of stratigraphic posi- mento Valley; A. bellavistana from one mile tion except in a broad sense. North of Frazier Corners East of Redding; A. berreyessaensis from the same locality as Family APORRHAIDAE A. californica above; A. roguensis from Genus ARRHOGES Gabb, 1868 ARRHOGES CALIFORNICUS (Gabb) Phoenix, Oregon; A. colusaensis from the PI. 102, figs. 6,7 Peterson Ranch near Sites in Colusa Aporrhais californica Gabb, 1864, p. 128, pi. 29, County; A. yrekensis from Hagerdorn figs. 230 a,b. Ranch, Siskiyou County. It would probably Arrhoges californicus (Gabb), Stewart, 1926, p. be too much to expect that all these can be 363, pi. 21," fig. 15. considered as one species as the lower occur- Anchura (Arrhoges) californica (Gabb) Stewart, rence is upper Albian for specimens from Anderson, 1958, p. 165. the Bald Hills formation, and probably Shell small, spire about \ height of shell; Senonian (?) for A. ursula or A. ursulagorda. number of whorls about 8; ornamentation Yet examination of the collections fails to consists of narrow longitudinal ribs shal- show any obvious reason for the separation lowly concave toward the aperture and ex- of two or more species. The amount of vari- tending from just below the suture to the ation between specimens from a single lo- widest portion of the whorl, they number cality is as much as the variation among about 20 per whorl except on the body specimens of all localities. whorl where the number is reduced to 3 Trajanella californica (Gabb) closely re- more pronounced ribs on the back of the sembles the figure of T. amphora (d'Or- whorl with the apertural side covered by

EXPLANATION OF PLATE 102 FIGS. 1—Cantharus occidentalis (Gabb) Apertural view of specimen 28637 U.C.L.A. Invert Paleo. Cat. XI. 2—Acteon sullivanae n. sp. Apertural view of the holotype, 28642 U.C.L.A. Invert. Paleo. Cat. X2. 3,4—Cylichna andersoni n. sp. 3, view of specimen 28653 U.C.L.A. Invert. Paleo. Cat. showing the shape of the shell: 4, apertural view of the holotype, 28652 U.C.L.A. Invert. Paleo. Cat. X2. 5—CUnura anassa n. sp. Apertural view of the holotype, 28641 U.C.L.A. Invert. Paleo. Cat. XL 6,7—Arrhoges californicus (Gabb). 6, apertural view of a small specimen, 28626 U.C.L.A. Invert. Paleo. Cat., showing spire and ornamentation of early whorls; 7, adult specimen, 28625 U.C.L.A. Invert. Paleo. Cat., showing body whorl and partially preserved wing, X2. 8,9—Paleosephaea sacramentica n. sp. 8, oblique view of aperture of holotype, 28638 U.C.L.A. Invert. Paleo. Cat., showing the three columellar plications; 9, view of specimen 28640 U.C.L.A. Invert. Paleo. Cat. showing ornamentation of shell. XL 10—Mesopuzosia colusaense (Anderson). Lateral view of specimen 28658 U.C.L.A. Invert. Paleo. Cat. Slightly less than natural size. 842 MICHAEL A. MURPHY AND PETER U. ROD DA callus, shell surface covered by fine spiral angulation; one or two secondaries may be lines with the two or three just below the developed below the lower angulation; the suture much stronger than the others; on surface of young specimens is covered by some specimens the longitudinal ribs are so fine lirae, in the adult the ornamentation is reduced as to form a reticulate sculpture; mostly covered with callus; number of growth lines are obscure on most of the whorls is greater than 5; suture linear, shell, but the outer lip is ornamented only faint; aperture narrow above, widening be- by growth lines; the first three whorls are low (anterior part unknown); in adult unornamented; wing large, as wide as body specimens the posterior digitation rises whorl, with posterior rostrum nearly as high along the upper part of the shell obliquely as spire; outer portion of wing thickened; and attached to the spire for about f the anterior canal moderately long and rapidly length of spire and then is free of spire and tapering from body whorl; inner lip smooth directed away from aperture; anterior digi- with light callus. tations not preserved; adult possesses tuber- Hypotypes.—The hypotypes, U.C.L.A. cule-like knob f of a turn back from the Invert. Paleo. Cat. nos. 28625 and 28626, aperture, apparently a callus deposit. were collected from locality 3465 on the Holotype.—The holotype, U.C.L.A. In- North Fork of Cottonwood Creek. Dimen- vert. Paleo. Cat. no. 28627 was collected sions of adult specimen: height 21 mm. from locality 3763. Dimensions: height (in- (incomplete—lacks first whorl and top of complete) 19 mm., spire height 9 mm. (in- anterior canal), height of spire 11 mm.; maxi- complete), greatest width (less apertural mum thickness of last whorl (not including canals) 12 mm. Paratypc U.C.L.A. Invert. outer lip) 8 mm. (including outer lip) 16 Paleo. Cat. no. 28628. mm. Remarks.—This species differs from the Remarks.—The specimen figured by Stew- genotype, T. distorta Gabb (1864, pi. 20, art (1926, p. 363, pi. 21, fig. 15) is here figs. 82,82a,b), in having three primary ribs designated as the lectotype of Arrhoges on the body whorl and a much smaller tu- californicus (Gabb). The hypotypes have bercule-like process. T. bicarinata (Gabb) been compared with this specimen through (Gabb, 1869, pi. 27, fig. 47; Stewart, 1926, the courtesy of H. Richards, of the Academy pi. 23, fig. 6) is shorter, wider and has two of Natural Sciences of Philadelphia who heavy carinae with no intermediate rib. loaned us the type lot. The lectotype is The trivial name is from Latin, three. "probably from the Siskiyou Mountains" (Stewart, 1926, p. 363). This species is very Genus GYRODES Conrad, 1860 similar to specimens in the U.C.L.A. collec- GYRODES ALLISONI n. sp. tion of A. occidentalis (Beck), the genotype, PI. 101, figs. 18,19,20 a Recent shell from the North Atlantic. Shell thin, small to medium size; spire This Cretaceous species is much smaller, has about g the height of the shell; number of shorter longitudinal ribs, fewer spiral lirae, whorls about 4; subangular shoulder and possesses two to three strong spiral ribs wide posterior tabulation; tabulation flat just below the suture, and has a slightly to very shallowly grooved; ornamentation longer anterior canal. of spiral lines, very fine on most of the whorl, and strongly developed on the pos- Genus TESSAROLAX Gabb, 1864 terior tabulation; growth lines fine but dis- TESSAROLAX TRINALIS n. sp. tinct; sharp double angulation at the edge PI. 103, figs. 1,2,3 of the umbilicus, band between angulations Shell small, moderately thick, spire about flat to depressed and nearly as wide at the \ height of shell; body whorl biangulate with umbilical opening; suture impressed; aper- two rounded carina-like spiral ribs at the ture elongate oval. angulations and a third midway between; Holotype.—The holotype and paratype, the upper rib is slightly stronger than the U.C.L.A. Invert. Paleo. Cat. nos. 28629 and lower ribs and all may be slightly beaded; a 28639, respectively, were collected at local- single secondary rib may be developed be- ity 3464 near the Gas Point road. Dimen- tween the posterior suture and the upper sions of the holotype: height 13 mm., height MOLLUSC A OF CRETACEOUS ROCK, CALIFORNIA 843 of spire 2\ mm.; maximum width of last last volution to be slightly flattened on the whorl 12 mm. posterior half of the whorl; aperture similar Remarks.—This species most nearly re- to the genotype but more elongate and sembles "Gyrodes" siskiyouensis Anderson columellar wall more curved; umbilicus (1958, p. 150, pi. 21, figs. 6,7) in ornamenta- elongate, narrow, eye-shaped slit; moderate tion, but has a more prominent shoulder, callus on the inner lip. and a flattened or slightly concave flank be- Holotype.—The holotype and paratypes, low the shoulder. The umbilical characteris- U.C.L.A. Invert. Paleo. Cat. nos. 28631, tics of G. siskiyouensis are not known. This 28632, 28633, respectively, were collected at species differs from other California forms U.C.L.A. locality 3763. Dimensions of holo- in the ornamentation of the tabulation. type: height of shell 24 mm.; width of body This species is named for Edwin Allison, whorl 17 mm.; height of spire 9 mm. Department of Paleontology at the Univer- Remarks.—A. stantoni n. sp. resembles sity of California, Berkeley. Lunatia avellana Gabb (1864, pi. 19, fig. 60) but does not resemble the plate of Stewart's GYRODES GREENI n. sp. lectotype of Ampullina avellana (Gabb) PI. 101, figs. 27,28,29 (1926, pi. 21, fig. 9). Gabb's figure shows Shell medium to large, heavy; spire about the slight bending of the inner lip which is £ the height of the shell; number of whorls characteristic of A. stantoni n. sp. and 4-5; angular shoulder with narrow tabula- Stewart's does not. Stewart's lectotype ap- tion; suture impressed; ornamented only pears to be more globose. The umbilicus of by growth lines; yery sharp single angula- A. stantoni, while small, is not as Gabb tion along the umbilical edge; umbilicus states for A. avellana, "barely visible." wide, open; aperture broadly comma- A. stantoni n. sp. was found abundantly shaped. at localities 3473 and 3765 in the Bald Hills Holotype.—The holotype, U.C.L.A. In- formation and also with the Brewericeras vert. Paleo. Cat. no. 28630 was collected hulenense fauna near Clear Creek near the from locality 3465 near the North Fork of site of the old mining camp of Horsetown. Cottonwood Creek. Dimensions; height, 30 The species is named for T. W. Stanton, mm.; height of spire 5 mm.; maximum pioneer worker in California Mesozoic pale- width of last whorl 31 mm. ontology. Remarks:—Gyrodes greeni resembles Gy- rodes expansa (Gabb) (Stewart, 1926, pi. AMPULLINA MONA n. sp. 22, figs. 1,1a), but the latter species has a PI. 101, figs. 12,13 much wider tabulation, a broader spire and Shell globose, thick, medium-sized; spire a rounded angulation at the umbilical edge. f height of shell; faint spiral lines at shoul- Small specimens of G. greeni n. sp. resemble der, rest of shell smooth except for growth topotypes of G. canadensis Whiteaves (1879, lines; number of whorls 4; suture impressed; pi. 16, figs. 2,2a), but lack the sub-shoulder aperture comma-shaped, widest just above constriction, the groove in the tabulation, the base (anterior end missing); umbilicus a and the double angulation of the umbilical short narrow depressed area; moderate cal- edge that are present on the latter species. lus on the inner lip. The species is named for A. L. Green, Ono, Holotype.—The holotype and only speci- California. men, U.C.L.A. Invert. Paleo. Cat. no. 28634 was collected from locality 3778 on Huling Genus AMPULLINA Bowdich, 1822 Creek about 5 feet above the conglomerate AMPULLINA STANTONI n. sp. at the base of the Bald Hills formation. Di- PI. 101, figs. 9,10,11 mensions: height (incomplete) 21 mm.; Shell thick, medium-sized; spire about | greatest diameter of body whorl 20 mm.; height of the shell; ornamentation is of height of spire (incomplete) 6 mm. prominent growth lines on last whorl, occa- Remarks.—This species is not as tall as sional specimens with very faint spiral stri- A. stantoni, is more inflated and has a lower ation; number of whorls about 5; whorl pro- spire. The umbilicus is not open as it is in file gently rounded with a tendency for the A. stantoni and the callus on the inner lip is 844 MICHAEL A. MURPHY AND PETER U. ROD DA much heavier. A. avellana (Gabb) has a off from flank and umbilicus by abrupt smaller, thinner shell with a higher spire change in the curvature of the shell rather and a lighter callus than A. mona n. sp. than by distinct angulations; callus re- This species is named for Mrs. Ramona stricted to inner lip. Rodda. Holotype.—The holotype, U.C.L.A. In- vert. Paleo. Cat. no. 28636, was collected at Genus EUSPIRA Agassiz, 1839 locality 3465 near the North Fork of Cot- EUSPIRA POPENOEI n. sp. tonwood Creek. Dimensions: height 25 PI. 101, figs. 21,22,23 mm.; spire height 5 mm.; greatest width Shell moderately thick, medium-sized; 25 mm. spire about | the height of the shell; smooth Remarks.—Differs from E. popenoei in except for growth lines and very fine spiral having faint tabulation and shoulder near striae that are most often preserved on the the posterior suture and a larger umbilicus younger whorls; number of whorls about 5; and in lacking an angulate umbilical edge. body whorl slightly flattened above the Differs from Polinices shumardianus (Gabb) middle; junction between umbilical wall in having an open umbilicus. and whorl flank angulate; suture impressed; It is very difficult to give generic assign- aperture nearly semicircular with very slight ments to E. popenoei and E. marianus. The notch or gutter at the posterior suture; um- type specimens are so close that one would bilicus moderate size; callus restricted to certainly not separate them generically, yet inner lip. each resembles a different genus. E. pope- Holotype.—The holotype, U.C.L.A. In- noei most resembles the type of Euspira, vert. Paleo. Cat. no. 28635, was collected at Euspira labellata (Lamarck), in general locality 3464 near the Gas Point road. Di- shape, but has a more impressed suture, a mensions: height 26 mm.; spire height 6 more retracted growth line, a more open mm.; greatest width 24 mm. umbilicus (slightly), bounded by an angu- Remarks.—Euspira popenoei n. sp. differs lation, and the callus does not extend across from Euspira marianus n. sp. in having a and above the umbilicus as in Euspira. E. smaller umbilicus, an angulation between marianus resembles the type of Gyrodes the umbilical wall and the flank, and an im- (Sigaretopsis), G. (S.) injundibulum (Wate- pressed suture. Euspira popenoei n. sp. dif- let), but has a more channeled suture, the fers from the lectotype of Polinices shu- growth lines are not inclined forward so mardianus (Gabb) Stewart (1926, pi. 21, strongly, possesses definite, but weak, double angulation at the edge of the umbili- fig. 11) in lacking the partially closed um- cus (somewhat like Gyrodes s.s.), and the bilicus, in being taller, in having a more callus does not extend across above the um- elongate aperture and in having an angula- bilicus. E. marianus very closely resembles tion at the umbilical edge. specimens in the U.C.L.A. collection from This species is named for W. P. Popenoe the Gault of Folkestone, England labeled, of the University of California, Los Angeles. Gyrodes genti (Sowerby), but these specimens have a more impressed suture and a EUSPIRA MARIANUS n. sp. wider, but less angulate umbilicus. E. mari- PI. 101, figs. 24,25,26 anus would seem to be closely allied to Shell moderately thick, medium-sized; Gyrodes while one would hesitate to put E. spire about f height of the shell, number of popenoei in Gyrodes. Assignment to Euspira whorls about five; body whorl flattened is questionable. above the middle; faint shoulder and tabu- Gyrodes pluvianus Stephenson (1952, p. lation near the posterior suture; shell 152, pi. 36, p. 20-23) is similar to this spe- smooth except for growth lines and fine cies, but appears to have a larger umbilicus spiral striae faintly developed on the shoul- with a more pronounced angulation, and a der; suture impressed; aperture nearly semi- lower spire. circular; umbilicus large, open; narrow flat- The species is named for Andrew Mari- tened area between true umbilical depres- anos, micro-paleontologist for the Humble sion and flank, somewhat like the double Oil and Refining Company, Chico, Cali- angulation of Gyrodes allisoni n. sp., but set fornia. MOLLUSC A OF CRETACEOUS ROCK, CALIFORNIA 845

Family BUCCINIDAE is slightly stronger and the posterior slightly Genus CANTHARUS Roding, 1798 weaker than the median fold. CANTHARUS OCCIDENTALIS (Gabb) Holotype.—The holotype, U.C.L.A. In- PI. 102, fig. 1 vert. Paleo. Cat. no. 28638, was collected at Fusus occidentalis Gabb, 1869, p. 146, 215, pi. 26, locality 3474 on Coyote Creek. Dimensions: fig. 23. height of the whorl (incomplete) 35 mm.; Pseudopenssolax (?) occidentalis (Gabb), Stewart, height of spire (incomplete) 18 mm.; maxi- 1926, p. 430, pi. 21, fig. 1. mum width of last whorl 14 mm. Fig. 9 is a One incomplete but well preserved speci- larger specimen collected above the Bald men from the Bald Hills formation has been Hills formation at locality 3817, and is the compared to the holotype (Stewart, 1926, paratype, U.C.L.A. Invert. Paleo. Cat. no. pi. 21, fig. 8) and is believed to be conspe- 28640. cific. However, our specimen has a single Remarks.—This is the first record of this strong varix along the outer margin of the genus in the California Cretaceous. The aperture and another weakly formed about specimens agree with the description and f of a revolution behind. The possession of figures of the genotype, P. mutabilis Wade a varix is probably a variable feature as (Wade, 1926, p. 123, pi. 40, figs. 4,5,8). P. neither Stewart's nor Gabb's figures show sacramentica n. sp. is slenderer and has varices, nor does either author mention smaller and more abundant axial ribs than them, and they are not present on other the genotype, and the anterior columellar specimens in our collections referred to this fold is not as strong. P. sacramentica n. sp. species. differs from P. decorosa Stephenson and P. Holotype.—The type specimen is reported patens Stephenson (1952, pi. 41, figs. 23-26) to come from Martinez, but this has not from the Woodbine formation of Texas in been confirmed. being a smaller shell and having the anterior Figured specimen.—The figured speci- columellar fold the largest of the three. men, U.C.L.A. Invert. Paleo. Cat. no. 28637 The species derives its name from its oc- was collected from locality 3465 near the currence in the Sacramento Valley. North Fork of Cottonwood Creek. The species also occurs at U.C.L.A. locality 3816 Family TURRIDAE above the Bald Hills formation. Dimen- Genus CLINURA Bellardi, 1875 sions: height 18.5 mm.; height of spire (in- CLINURA ANASSA n. sp. complete) 8.5 mm.; maximum width of last PI. 102, fig. 5 whorl 13 mm. Shell medium-sized, moderately thick, fusiform; spire elevated and acute, about \ Family VOLUTIDAE the height of the shell; number of whorls Genus PALEOPSEPHAEA Wade, 1926 (incomplete) almost 5; suture impressed; PALEOPSEPHAEA SACRAMENTICA n. sp. axial sculpture of 10-12 strong nodes per PI. 102, figs. 8,9 whorl on the angulation; irregular, narrow Shell medium sized, heavy, fusiform; spire axial ribs extend below the angulation and height about \ height of shell; number of form- beads where they cross the primary whorls about 5; axial ornamentation of spiral ribs; spiral ornamentation of 3 evenly elongate ribs extending from suture to su- spaced coarsely beaded, primary spiral ribs ture except on body whorl where ribs die in the upper half of the lower flank below out on the anterior slope, 12 ribs on last the angulation; surface covered by spiral whorl, 11 on penultimate whorl, concave lirae; growth lines prominent and reflect aperturally; spiral sculpture of fine spiral broad shallow notch on the upper flank of lines most prominent on posterior slope; the whorl above the angulation; columella faint growth lines parallel the axial ribs; smooth, twisted, with light callus on inner aperture elongate, narrowly rounded pos- lip; anterior incomplete on all specimens. teriorly; outer lip simple, broadly convex; Holotype.—The holotype, U.C.L.A. In- inner lip concave posteriorly, broadly con- vert. Paleo. Cat. no. 28641, was collected at vex anteriorly, with a thin callus; columella locality 3476 on Coyote Creek. Dimen- bears three oblique folds; the anterior fold sions: height (incomplete) 23.5 mm.; height 846 MICHAEL A. MURPHY AND PETER U. ROD DA of spire (incomplete) 11.5 mm.; maximum Specimens very close to T. impressa Gabb width of last whorl 12 mm. have been found at several localities in the Remarks.—This species is similar to Cli- Bald Hills formation. These agree well with nura io (Gabb) (Gabb, 1864, pi. 28, fig. Stewart's figured specimens (1926, pi. 24, 214) from the Eocene (Tejon) of California, figs. 7,8) in size and shape, but have smaller but differs in the following ways: Clinura more abundant spiral ribs, and the orna- anassa n. sp. is slightly taller and slimmer, mentation is not subdued or absent on the has more abundant and slightly more sub- upper third of the whorl. This species occurs dued nodes on the angulation, fewer pri- throughout the Bald Hills formation and in mary spiral ribs on the lower flank (3-4 as the formation immediately above as well. compared to 10-12 for C. io), a convex The figured specimens are, U.C.L.A. In- whorl profile on the upper half of the lower vert. Paleo. Cat. nos. 28643, 28644, 28645, whorl, and no sutural collar. 28646 and were collected at U.C.L.A. local- This is apparently the oldest record of the ity 3476. family Turridae as defined by Wenz (1943, p. 1380). Previously described species of Genus BIPLICA Popenoe, 1957 Clinura are Eocene or younger. BIPLICA ISOPLICATA Popenoe The trivial name is from Greek, queen. PI. 101, figs. 14,15,16,17 Biplica isoplicata Popenoe, 1957, p. 434-435, pi. Family ACTEONIDAE 50, figs. 12-17. Genus ACTEON Monfort, 1810 Specimens from eleven localities in the ACTEON SULLIVANAE n. sp. Bald Hills formation have been assigned to PI. 102, fig. 2 this recently described species (Popenoe, Shell, small, high spired; spire about \ 1957, p. 434-35, pi. 50, figs. 12-17). Strati- height of shell; number of whorls about 6; graphically these specimens occur between suture impressed; ornamentation consists of the listed occurrences of Biplica michaeli, a spiral grooves which are strongest near the lower Albian species, and B. isoplicata, a anterior and become weaker posteriorly ex- Turonian form. Some of the specimens from cept for three just below the suture; sur- locality 3476 are notably larger than any face covered by fine lines of growth; aper- specimen of B. isoplicata previously reported ture elongate, narrowest posteriorly; inner but are otherwise similar. The species is lip with a light callus; columella with a abundant throughout the Bald Hills forma- single small fold situated at the juncture of tion. the columellar and parietal lips. Types.—The holotype, U.C.L.A. Invert. Holotype.—The holotype and only speci- Paleo. Cat. no. 27742, was collected at men, U.C.L.A. Invert. Paleo. Cat. no. U.C.L.A. locality 3287. The hypotypes, 28642, was collected at locality 3768 east of U.C.L.A. Invert. Paleo. Cat. nos. 28647, the old Gas Point Road. Dimensions: height 28648, 28649, are from U.C.L.A. locality 8.5 mm.; height of spire 4.2 mm.; maximum 3476. width of last whorl 3.7 mm. BIPLICA aff. B. MICHAELI Popenoe Remarks.—Acteon sullivanae n. sp. is PI. 101, figs. 1,2,3,4 similar to A. politus (Gabb), but differs from the lectotype (Stewart, 1926, p. 341, Biplica michaeli Popenoe, 1957, p. 433-434, pi. 50, figs. 9-11. pi. 24, fig. 18) of the latter in being nar- rower and in having a higher spire and more Specimens of the genus Biplica from lo- numerous spiral ribs with a wide smooth cality 3763 in the Bald Hills formation are band on the posterior f of the whorl. considered to have affinities for B. michaeli The species is named for Mrs. Catherine Popenoe. Small specimens at this locality Sullivan on whose ranch it was found. (altitude 4.0-5.4 mm.) agree with this species in essential details except that they Genus TORNATELLAEA Conrad, 1860 have a slightly lower spire. At the same lo- TORNATELLAEA sp. aff. T. IMPRESSA (Gabb) cality large specimens (altitude 7.5-11.0 PI. 101, figs. 5,6,7,8 mm.) have proportions similar to B. mi- Acteon impressus Gabb, 1864, p. 142, pi. 21, fig chaeli, but are much larger. In fact, these 106. specimens are larger than any representa- MOLLUSC A OF CRETACEOUS ROCK, CALIFORNIA 847 tives of Biplica known below the uppermost under C. costata, but the specimens have not Santonian (?) or lowermost Campanian (?) been found (Stewart, 1926, p. 440). (Popenoe, 1957, fig. 1). These large speci- The species is named for F. M. Anderson, mens lack the third tooth-like projection on former curator of the California Academy the posterior end of the inner lip of B. mi- of Sciences. chaeli. This feature, however, is not considered as diagnostic as shape and spire height Class CEPHALOPODA (Popenoe, oral communication, 1958). The Order AMMONOIDEA Zittel, 1884 third tooth-like projection is known only Family TURRILITIDAE Meek, 1876 from the holotype of B. michaeli. It is to be Genus PSEUDHELICOCERAS Spath, 1921 expected that the limits of variation of B. PSEUDHELICOCERAS PETERSONI (Anderson) michaeli may be greatly extended as its hy- PI. 107, figs. 1,2,3 podigm consists of only four specimens. Turritites petersoni Anderson, 1958, p. 193, pi. 12, The difference in stratigraphic position fig. 6, pi. 75, fig. 4. Pseudohelicoceras petersoni (Anderson), Matsu- and size of B. michaeli and B. aff. michaeli moto, 1958, p. 651. is such that it seems best to reserve judg- ment on the specific identification of these Coiling dextral, loose, successive whorls specimens until the variability of B. michaeli not in contact; ornamentation of light ribs is better known. and tubercles; ribs rursiradiate, inflected Figured specimens.—U.C.L.A. Invert. slightly posteriorly on the posterior side of Paleo. Cat. nos. 28650 and 28651. the whorl, interrupted on the flanks in part by four spiral rows of tubercles; tubercles Family SCAPHANDRIDAE broad, low blister-like, arranged in four Genus CYLICHNA Loven, 1846 spiral rows and placed en echelon one above CYLICHNA ANDERSONI n. sp. the other on the flanks and anterior part of PI. 102, figs. 3,4 the shell so that they parallel the ribs; two Shell very small, elongate, cylindrical; or three ribs are interrupted by each tu- spii&Tsunken in pit in top of shell; number bercle and two or three ribs pass across the of whorls about 3; apex truncated and very flank uninterrupted between the tubercles; flat; spire pit about \ diameter of the trun- suture complex, L narrow, deep, bifid, un- cated apex; ornamentation of fine spiral dercutting the first lateral saddle and E, E lines widely spaced and prominent on the about § as deeply incised as L (PI. 107, fig. 3). anterior half of the whorl with a few closely Hypotype.—The hypotype is specimen spaced spiral lines immediately above and number 28722 U.C.L.A. Invert. Paleo. Cat. below the posterior angulation; very fine It was collected at U.C.L.A. locality 3775 spirals occasionally present on the rest of in the lowest conglomerate unit of the Bald the whorl; fine growth lines. Small crenula- Hills formation on the North Fork of Cot- tion immediately below the posterior angu- tonwood Creek. The specimen was in a limy lation; aperture narrow linear, outer lip sandstone clast in the conglomerate. vertical, inner lip appears to be without cal- Remarks.—The suture differs markedly lus; basal portion of aperture evenly from that of the genotype, P. robertianum rounded, projects slightly below base of (d'Orbigny), as figured by d'Orbigny (1842, columella. pi. 142) in that L is much larger than and Types.—The holotype and paratype, undercuts E. The reverse is true in the geno- U.C.L.A. Invert. Paleo. Cat. nos. 28652 and type. 28653, respectively, were collected at local- Range.—The true stratigraphic occur- ity number 3476 on Coyote Creek. Dimen- rence of the species is probably not later sions of the holotype: height 3£ mm., maxi- than upper Albian, the highest known occur- mum width 2 mm. rence of the genus. Remarks.—No species close to this has been previously described from the Cali- PSEUDHELICOCERAS sp. fornia Cretaceous. Stewart's choice of a lec- A single specimen of Pseudhelicoceras was totype from Martinez for Cylichna costata found at U.C.L.A. locality 3778 about 5 feet Gabb places that species in Scaphander. stratigraphically above the lowest conglom- Gabb mentions other Cretaceous localities erate of the Bald Hills formation exposed on 848 MICHAEL A. MURPHY AND PETER U. ROD DA

Huling Creek. The specimen is sinistrally slightly more closely spaced; in the younger coiled and half again as large as the speci- states of growth the prominences are men described under Pseudhelicoceras peter- sharper and more spiny; cross-section of the soni (Anderson) and probably represents a whorl is egg-shaped. different species. It is noted here because it Holotype.—The holotype, specimen num- is the only specimen found above the lowest ber 28654 U.C.L.A. Invert. Paleo. Cat., was conglomerate unit of the Bald Hills forma- collected at locality 3467 from the lowest tion that is the member of a taxonomic conglomerate bed of the Bald Hills forma- group restricted to the Albian. It is, there- tion exposed on the North Fork of Cotton- fore, on the evidence of this single specimen wood Creek. The specimen was enclosed in that we date the lowermost unit of the Bald nodular limestone, probably a clast in the Hills formation on the North Fork of Cot- conglomerate. Dimensions: height (incom- tonwood Creek and Huling Creek as upper- plete) 45 mm., maximum width 33 mm., most Albian. height of whorl 20 mm., width 16 mm., ap- The specimen was found in nodular lime- ical angle 34°. stone in mudstone matrix. It is number Remarks.—This is the first species of the 28723 U.C.L.A. Invert. Paleo. Cat. genus described from California. It differs from the genotype M. bergeri Brongniart, in Genus MARIELLA Nowak, 1916 having a much larger apical angle. MARIELLA (MARIELLA) FRICKI n. sp. M. (M.) fricki resembles Turrilites ber- PI. 103, fig. 7 geri Brongniart (Sharpe, 1856, pi. 26, fig. 10) Turrilites bergeri Brongniart, Anderson, 1958, ( = Paraturrilites lewesiensis Spath, Wright p. 193, pi. 11, fig. 2. and Wright, 1951, p. 40), but in Sharpe's Apical angle 34°; the whorl is ribbed from figure the posterior portion of the whorl ap- unbilical edge to the upper whorl suture; pears to be smooth, unlike M. (M.) fricki ribs are less well defined on the posterior which possesses posterior ribs. quarter of the whorl; each rib has four The specimen figured by Anderson (1958, prominences with the lower three approxi- pi. 11, fig. 2) is crushed but apparently rep- mately equal in size and somewhat smaller resents the same species although found than the upper; the upper prominence is somewhat higher in the section. bullate, the middle two are more tuberculate The species is named for Master John than bullate, while the lower tends to be Frick of Chico, California, who found the slightly bullate; the upper three rib promi- holotype while in the company of the nences are equidistant whereas the lower is writers.

EXPLANATION OF PLATE 103 FIGS. 1-3—Tessarolax trinalis n. sp. 1, holotype, 28627 U.C.L.A. Invert. Paleo. Cat., showing the character of posterior canal; 2,3, two views of a smaller specimen, 28628 U.C.L.A. Invert. Paleo. Cat., showing the ornamentation of the spire, X2. 4,5—Solariella steward n. sp. 4, apertural view of the holotype, 28622 U.C.L.A. Invert. Paleo. Cat; 5, oblique view of the spire of specimen 28623 U.C.L.A. Invert. Paleo. Cat. showing the ornamentation of the shoulder, X2. 6—Turrilites dilleri n. sp. Holotype, 28655 U.C.L.A. Invert. Paleo. Cat., XL 7—Mariella fricki n. sp. Holotype, 28654 U.C.L.A. Invert. Paleo. Cat., XL 8—Mortoniceras gainesana (Anderson). Lateral view of specimen 28674 U.C.L.A. Invert. Paleo. Cat., approximately § natural size.