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The Nautilus, Xxv i I mi THE NAUTILUS A MONTHLY JOURNAL DEVOTED TO THE INTERESTS OF CONCHOLOGISTS VOL. XXV. MAY, 1911, to APRIL 1912. EDITORS AND PUBLISHERS: H. PiUBBT, Curator of the Department of MoUusca, Academy of Natural Scleiicra Philadelphia. C. W. JoH>80N, Curator of the Boston Society of Natural UlstoiT, Boston. INDEX TO THE NAUTILUS, XXV. INDEX TO SUBJECTS, GENERA AND SPECIES. Abalone, Collecting shells from the 73 Admete from Bering Sea, A giant 19 Admete regina Dall, n. sp. 20 Aesopus goforthi Dall, n. sp. 127 Agriolimax agrestis on Nantucket and Cuttyhunk 60 Alabama, The Mollusca of Monte Sano 121 Amastra, The distribution of Oahuan species of. 13 Amastra elongata Newc. 15 Amastra heliciformis Anc. 15 Amastra reticulata Nc. 15 Ancylus burnupi Walker . 142 Ancylus cafifer Krauss 139 Ancylus c. capensis Walker 141 Ancylus c. farquhari Walker 140 Ancylus c. gordonensis M. and 140 Ancylus c. nanus Walker. 139 Ancylus c. stenochorias M. & P. 140 Ancylus c. trapezoideus Bttg. 141 Ancylus connollyi Walker. 143 Ancylus equeefensis Walker 143 Ancylus fontinahs Walker 144 Ancylus mooiensis Walker 141 Ancylus gaulus Gkl. 139 Ancylus obliquus Krauss. 140 Ancylus transvaalensis Craven 142 Ancylus verreauxii Bgt. 142 Ancylus victoriensis Walker 144 Ancylus zambesiensis Walker 144 Anodonta and Anodontites 88, 91 Anodonta couperiana and A. gibbosa, Notes on. 129 (iii) IV THE NAUTILUS. Anodonta complanata . 22 Anodonta cygnea .... 22 Anodontinae Ortmann . 21 Argyrodonax Dall, n. g. 85 Argyrodonax haycocki Dall, n. sp. 85 Argyrotheca bermudana Dall, n. sp. 86 Arion rubelliis Sterki in Lake Co., Ohio . 64 Arkansas shell collecting . 40 Arkansia wheeleri Ortm. and Walk., n. sp. (PI. VIII) . 98 Bermuda, A new Brachiopod from . 86 Bermuda, A new genus of bivalves from . 85 Bifidaria duplicata Sterki, n. sp. 116 Bifidaria hordeacella, reversed . 116 Boston Malacological Club 7 Brazil, Correspondence from 37, 54 California, The land Mollusca of San Mateo Point . 17 Californian Mollusca, New . 127 Chiton aureus Spalowsky. 36 Collecting from Haddock on the George's Banks . 104 Collecting on the Sipsey River, Alabama . 84 Colorado, Land Mollusca at Tolland. 58 Colorado, Oreohelix colonies . 133 Congeria, On the type of . 95 Cuba, A vacation trip to . 3 Cuban collecting, An incident in • 40 Diplodon australis, The anatomy of . 100 Dosidicus gigas d'Orb. 117 Edson, Henry M. 132 Elliptio, The generic name . 88 Epiphragmophora californensis and the shells commonly called varieties thereof . 68 Epiphragmophora fidelis . 18, 60 Epiphragmophora infumata Gld., Note on 59, 94 Eupleura grippi Dall, n. sp. 87 Florida, Land shells of Garden Key, Dry Tortugas 91 Glabaris .... 91 Glossina, The name. 96 Grippina californica Dall, n. sp 128 Grippina Dall, n. gen. 128 Haliotis pourtalesii Dall . 81 THE NAUTILUS. Harford, W. G. W. (obituary) 8 Harpa, The nomenclature of . .65 Helix (Dentellaria) badia Fer., New color varieties . 48 Helix badia var. roseolabrum Smith, n. var. .48 Helix badia var. unicolor Smith, n. var. .48 Helix hortensis var. dichroa Ckll. n. n. for bicolor Ckll not Picard ....... 60 Helix hortensis on Long Island, N. Y., etc. 92, 96 Hyridella australis (Lamarck), Anatomy of 100 Keep, Professor Josiah (obituary and portrait). 61 Lampsilis discus Lea ..... 36 Leptothyra grippii Dall, n. sp. 25 Limax maximus on Nantucket Island 60 Locomotive disk of Stylommatophora 62 Lymnaea auricularia in Ohio .... 11 Lymnaea auricularia in Canada 60 Lymnaea florissantica, Note on. 24 Lymnseidse of Aroostook County, Maine . 107 Lymnium, The use of the generic name . 88 Maine pearls ....... 120 Margaritana margaritifera L. 120 Margaritana monodonta Say, Distribution of 57 Margaritana, The use of the generic name. 88 Margaritanidffi Ortmann ..... 6 Maryland, Land mollusks of Garret County 111 Mesomphix laevigata latior Pils. 125 Modiolus demissus var. plicatulus in Brookline, Mass 132 Mollusks of Wellesley Island and vicinity, St. Lawrence River ........ 66 Mytilopsis Conrad ...... 95 Musculium declive Sterki, n. sp. 103 Naiad, A new North American .... 98 Naides, The classification of the European. 5, 21 Naticidae and Scalarida?, New Japanese 32 New Jersey, Land shells of Atlantic City . 35 Notes . 11, 24, 36, 48, 59, 83, 94, 120, 132 Omphalina kopnodes W. G. Binn. ..... 124 Opeas gracile (Hutton) in the United States . 114 Oreohelix, Notes on 18, 133 Oreohelix cooperi W. G. B 138 VI THE NAUTILUS. Oreohelix etrigosa depressa Ckll. .18, 136 Oreohelix yavapai Pils. ....... 18 Pachycheilus violaceus Preston, Note on . .88 Palseoglossa n. n. for Glossina . .96 Pearls in one Unio ........ 84 Pennsylvania, Land shells of Monroe County . .75 Pennsylvania, Molluscan fauna of Northampton County . 26 Physa gyrina, Notes on ...... 108 Pisidia from Alabama, New ...... 2 Pisidium dispar Sterki, n. sp 2 Pisidium inornatum Sterki, n. sp. .3 Pisidium, The cardinal teeth of. ..... 1 Planorbis cam panulatus smithii Baker, n. var. .118 Plaxiphora setigera ........ 36 Polinices pila Pils., n. sp 32 Polygyra albolabris alleni Weth., and other Missouri Helices 130 Polygyra clarkii bradleyi Vanatta, n. var. 120 Polygyra fuscolabris Pils. .123 Polygyra lawse Lewis . .132 Polygyra monodon cava Pils. and Van., n. subsp. 12 Polygyra sargentiana J. and P. .124 Polygyra smithii Clapp ....... 122 Polygyra (Triodopsis) obstricta, locality for . 60 Pseudanodonta. ........ 22 Publications received . 8, 23, 36 Rochefortia grippi Dall, n. sp. .128 Scalariidse, New Japanese. 32, 41 Scala kamakurana Pils., n. sp. .41 Scala pretiosa var. multivaricifera Smith, n. var. 56 Scala sagamiensis Pils., n. gp. .42 Scala stigmatica Pils. , n. sp. .34 Spondylus echinatus Martyn . .11 Squid off the California coast. Occurrence of a giant. 117 Stenogyra subula Pfr. .115 Strombus pugilis, Notes on the variation of . 109 Stylommatophora, Additional notes on the locomotive disk of ........ 62 Texas, Drift shells from 115 Thais (Purpura), Notes on 30 THE NAUTILUS. Vll Urocoptis Elliotti Poey Urocoptis (Gongylostoma) alvearis Torre, n. sp. Urocoptis (Gongylostoma) cioniscns Torre, n. sp. Urocoptis (Gongylostoma) dilatata Torre, n. sp. Urocoptis (Gongylostoma) dimidiata Torre, n. sp. Urocoptis (Gongylostoma) dimidiata intermedia Torre, n. var. Urocoptis (Gongylostoma) fallax Torre, n. sp. Urocoptis (Gongylostoma) intuscoarctata Torre, n. sp Urocoptis (Gongylostoma) proteus Torre, n. sp. Urocoptis (Gongylostoma) proteus castanea Torre, var. ........ Urocoptis (Gongylostoma) proteus robustaxis Torre, var. ........ Urocoptis (Gongylostoma) mayajiguensis Torre, n. sp. Urocoptis (Gongylostoma) mayajiguensis fulva Torre, n. var. ....... Urocoptis (Gongylostoma) remediensis Torre, n. sp. Urocoptis (Gongylostoma) tuba Torre, n. sp. Urocoptis (Gongylostoma) turgida Torre, n. sp. Urocoptis (Gongylostoma) uberrima Torre, n. sp. Urocoptis (Gongylostoma) villarensis Torre, n. sp. Unio, A new Florida .... Unio, etc. , The use of the generic name . Unio cicatricoides Frierson, n. n. (PI. II). Unio compertus Frierson, n. sp. (PI. III). Unio detectus Frierson, n. n. (PI. II, III) Unio tenuisculus Frierson, n. sp. (PI. I, figs. 4-6) Unio varicosus and cicatricosus. Remarks on Unionidee. ...... Vallonia in Chicago. .... Vertigo concinnula Ckll. .... Vertigo modesta parietalis Ancey Vitrea lewisiana Clapp .... Vitrea multidentata Binn. Vitrea radiatula electrina var. circumstriata Taylor Vivipara japonica Mart. Vivipara malleatus Rve. Vivipara, Asiatic, in California. Voluta junonia. ) V/H INDEX TO AUTHORS. Allen, John A. 60, 120 Baker, Fred. 37, 54 Baker F. C. 66, 118 Berry, S. S. 93, 117 Button, Fred. L. 59 Caffrey, G. W. 26 Clapp, Geo. H. 91, 94, 132 Clapp, W. F. 80, 104 Cockerell, T. D. A. 24, 58, 60, 96 Dall, W. H. 19, 25, 61 , 85, 86, 87, 127 Daniels, L. E, . 18 Edson (Harry), Henry M. 17, 68 Frierson, L. S. 36, 51, 129 Gifford, E. W. 60 Goodrich, Calvin . 11 Hand, E. E. 83, 95 Hannibal, Harold . 31 Hedley, C. 65 Henderson, Jr., John B. 49, 71, 81 Hinkley, A. A. 108 Johnson, C. W. 11, 109, 132 Nylander, O. 0. 107 Oldroyd, T. S. 73 Ortmann, A. E. 5, 20, 88, 97, 100 Pilsbry. H. A. 8, 12 13, 32, 34, 36, 41, 75, 95 Ramsden, Chas. T. Sampson, F. A. 40, 130 Smith, H. H. 84, 114 Smith, Maxwell 48, 56 Sterki, V. 1, 2, 62, 92, 103, 115 Stone, Witmer. Ill Torre, Carlos de la. 42, 75 Vanatta, E. G. 12, 120 Walker, Bryant 57, 97 Webb, Walter F. 3 Wheeler, H. E. 121 Williamson, Mrs. M. Burton 30 Winkley, H. W. ( viii The Nautilus. Vol.. XXV. MAY, 1911. No. 1 THE CAKDINAL TEETH OF PISIDIUM. BY V. STERKI. It has been asserted by earlier writers that Pisidium amnicum Miill. and virginicum Gmel. have two cardinal teeth in the right valve, and mainly on the strength of that character, Clessin has es- tablished the group Fluminina. Some authors have ascribed that feature to other species of Pisidium, or even to all, indiscriminately and without examination. But the whole tiling is based on a misappre- only one cardinal hension ; the fact is that the two Pisidin named have tooth in the right valve (and two in the left, like all others), and con- sequently the feature holds good not only for Pisidium, but for the whole family, Sphceriidce. It might be added that if tho>e species had really two teeth, Fluminina would mean a distinct genus, at least. In young, and even many half-grown specimens, there is plainly a single cardinal tooth, strongly curved. With advancing age there appears an indentation in the middle (above), as the anterior and posterior parts are growing more. They grow also in thickness, even the thinner anterior often becomes grooved, and at the same time the whole tooth becomes more curved, resp. angular, resembling the two in the left valve (inversely). But a careful examination will show that the two shanks are connected. On the other hand, in many specimens of P. compressum Pr., vari- ahile Pr., etc., there is a more or less marked indentation in the middle of the right cardinal. THE NAUTILUS. NEW PI8IDIA FROM ALABAMA. BY V. STERKI. Among the latest sending of Sphceriidx from Alabanaa and Ten- nessee, collected by Mr. H. H. Smith and sent for examination by Mr. Bryant Walker, there were three Pisidia which could not be referred to any of the established species and not to each other.
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