264 PALAEONTOLOGY OF CALIFORNIA. 



ANGARIA, Bolt. 



Delpliinula, Lam. 



I 



A. CTNGULATA, D. 8. 

 PL 35, Fig. 9. 



SHELL moderate in size, compact, whorls all in close contact; 

 spire moderately elevated; upper whorls rounded; body whorl 

 augulated, flattened above and on the sides, internally rounded; 

 umbilicus broad, bordered by a sharp angle. Surface ornamented 

 on the sides by large, oblique, longitudinal ribs or undulations, 

 and on the top, sides, and bottom by numerous small revolving 

 ribs ; two, larger than the others, on the umbilical margin. Aper 

 ture large, subangulated, rounded in advance; inner lip sinuous. 



Figure, natural size. 



Kare. A single specimen in the collection of Mr. F. L. A. Pioche, of San 

 Francisco. Well characterized by the whorls being all in close contact, by its 

 subangular form, and by the obliquely undulated surface. 



CINULIA, Gray. 

 Avellana, d 'Orb. 



C. RECTILABRUM, n. S. 

 PL 35, Fig. 10, 10 a. 



SHELL small, compact, solid, subglobose; spire moderately ele 

 vated; whorls four, rounded; suture impressed. Surface marked 

 by numerous large revolving ribs, in the interspaces of which 

 can be sometimes detected a few obsolete punctations. Aperture 

 elongate, narrow behind, rounded in advance; outer lip broad, 

 thick, nearly straight; inner lip heavily incrusted, and bearing 

 in advance two large, prominent folds ; anterior margin of the 

 mouth slightly emarginate. 



