BUCCINIDiB, 105 



from Clavella in the very shoi't spire and in the short and slightly ctirved 

 canal. 



A. GRAVIDA, Gabb. PI. 31, fig. 75. Miocene, California. 

 A. siNUATA, Gabb. PI. 31, fig. 76. Miocene, California. 



Sub-Family BUCCININ^. 



Genns ERIPACHYA, Gabb. Shell short, robust, subovate to subfusi- 

 form, spire moderately elevated. Aperture broad, terminating in advance 

 in a very short canal or a mere notch ; outer lip simple ; inner lip more or 

 less heavily incrusted. Surface marked by longitudinal ribs and revolving 

 lines. 



E. PERFORATA, Gabb. PI. 31, fig. 79. Cretaceous, California. 



Genus PSEUDOBUCCINUM, Meek and Haydeu. Shell oval, thin, 

 ventricose ; spire very short ; body volution large, not produced below ; 

 aperture large, terminating below in a rounded sinus ; outer lip thin and 

 simple ; inner lip very thin, smooth, and closely and very broadly folded 

 upon the imperforate umbilical region and body volution above, so as to 

 form, with a low revolving umbilical ridge, a kind of profoundly arcuate, 

 strongly spiral, false columella ; surface with more or less distinct revolv- 

 ing lines and furrows. 



Meek is inclined to believe that Bullia ampullacea is a living example 

 of his genus ; if so, Volutharpa, Fischer, will have priority over Pseudo- 

 buccinvm. 



P. Nebrascense, M. and H. PI. 31, fig. 78. Cretaceous, Moreau R. 



Genus ODONTOBASIS, Meek. Shell buccinoid-fusiform , spire more 

 or less produced ; body volution ventricose, and separated below from the 

 short naiTow beak, by a sharply defined, narrow, revolving sulcus, that 

 terminates below at the connection of the outer lip with the canal, in a 

 small tooth-like projection ; outer lip thin, smooth within, and nearly 

 straight in outline ; inner lip not thickened, Imt well-defined ; columella 

 a little twisted, slightly flattened, and bearing two oblique plaits below, 

 the lower one of which is formed by the raised lower edge of the obliqviely 

 truncated columella, and the other, which is very obscure, or perhaps 

 sometimes obsolete, placed a little above the same ; surface ornamented by 

 vertical folds and revolving lines and furrows. 



This genus referred doubtfully to the Buccinidas by Meek, seems to 

 unite characters of several difterent groups ; the shell is Buccinoid in form 

 and sculpture, but the fold and tooth remind one of Fasciolarise, whilst 

 the truncate columella recalls the Nassse. 



O. VENTRicosA, Meek. PI. 31, fig. 79. Cretaceous, Dakota. 



Genus ECTRACIIELIZA, Gabb. Shell accuminately oblong, spire 

 elevated (always truncated in the only species known). Surface com- 

 14 



