. Appendix to the Manual of Mollusca of Woodward, : containing such recent and fossil shells as are not mentioned in the second edition of that work . , DOrbigny, 1852. Example, H. dissimilis, DOrb. Shell conical prolonged, having a portion of the body chamberreflected, but not touching the other portion; section of theshell round or laterally compressed; sutures of the septadivided into six lobes, and as many saddles. Hamulina differs from Hamites in being only once reflectedinstead of twice, and from Ptychoceras in having the reflectedportion of the shell separate from the other,
. Appendix to the Manual of Mollusca of Woodward, : containing such recent and fossil shells as are not mentioned in the second edition of that work . , DOrbigny, 1852. Example, H. dissimilis, DOrb. Shell conical prolonged, having a portion of the body chamberreflected, but not touching the other portion; section of theshell round or laterally compressed; sutures of the septadivided into six lobes, and as many saddles. Hamulina differs from Hamites in being only once reflectedinstead of twice, and from Ptychoceras in having the reflectedportion of the shell separate from the other, not close together. Distribution, 15 species. Neocomian, France. Ootatoorgroup (= ? Gault), India. Peltarion, Deslongchamps, 1859. Founded on the mandibular armature of tetrabranchiatecephalopods * Many of the forms considered to belong to Crioceras have been ascertainedby M. Astier to be only more or less incomplete individuals of species belonging toAncyloceras. That Crioceras must merge into Ancyloceras appears inevitable. 12 GASTEKOPODA. Example, P. bilobatum. Upper Lias, Normandy. Fig. plates nearly circular or transversely oval ; ante-. Fig. 11. rior border rounded, posterior produced and truncated ; concaveabove and flattened below ; the two faces have one-half smoothand the other concentrically striated in an inverse directionto each other. Fossil, 3 or 4 species. Up. Lias—Cor. Rag. England;Normandy; Wurtemberg. CLASS II.—GASTEROPODA. Order I.—Prosobranchiata. Family II.—Mttricid^e (see p. 212, &c). The genera included in this family are :— Mtjrex, Typhis, Pisanta, Trophon, Easciolaria, Turbi-NELLA (Cynodonta, Latirus, Lagena), EUSTJS (Clavella, Chryso-domus, Pusionella, Tritonidea), EuEGUR, Cohinella, Myris-tica, and Lachesis Anachis, H. and A. Adams. Type, Columbella scalarina, Sowerby. Shell like Columbella; operculum elongated, unguiform,nucleus terminal, having close analogies with , 27 species. Tropical America. Ptychat
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