GASTEROPODA. 



Species of this genus are Buccinums witli a truncated colu- 

 nieila. 

 Distrihution, 5 species. Cliina, Central Ameria, Yigo Bay. 

 Fossil, 3 species. Eocene. Paris basin. 



[Family Pubpuredje] 



Is composed of tlie following genera : — 



PunPTJiiA, including Monoceros (of sectional value)* and the 

 sub-genera : — 



ConcJwJepas, Cuma, Eapana (see p. 217, under Pyrula), 

 Pinaxia, Adams. 



lOjpas, H. and A. Adams, 1853. Shell bucciniform, with a 

 small canal in the posterior angle of the aperture. Fossil, 

 3 species. Eocene. Paris. 



Vitiilaria, Swainson, 1840. Y. salebrosa. South and Central 

 America. Shell with irregular varices ; oj)erculum as in Purpura. 



Nitidella, Swainson. Shell as Cylindra ; spire sometimes 

 decollated; lip continuous or crenated; operculum elongate; 

 nucleus lateral. 



EicrNULA, Habpa, Ehizochchlltjs {Coralliophila, Adams), 

 and Magilus, with the 



Sub-genus Leptoconchus, Piippell. 



Shell similar to that of Magilus; young shell only with an 

 operculum. 



[Family Cassld^.] 



The genera referred to this family are : — 



Raxella (p. 214), Teiton (p. 214), Pyetjla (p. 217), Cassis 

 (p. 224), Okiscia (p. 225), Cassidasia (p. 225), Dolitjm 

 {Malea) (p. 226), and 



Nassaria, Pfeiffer. 



Animal analogous with that of Ranella, as regards the length 

 of the tentacles, position of the eyes, smallness of the head, 

 and by the form of the operculum, but is provided with a long 

 branchial siphon. 



Shell sub-canaculated in front, and deeply notched. 



[Family Olividje] 



Includes Oliya {Olivella, Scaphula, Agaronia), Ancillaeia 

 (Monoptygma, Lea).t 



* See p. 223. t See p. 227. 



15 



