178 SEMI NELL A. 



ribs crossed by strong spiral striae ; aperture pyriform, effuse 

 below, the lip posteriorly sinuate. Length, 4'5 mill. 



Sta. Barbara, 8. Diego, Catalina /., California, 



shore to ten fathoms. 



Belongs to a small group of narrow elongated species inhab-' 

 iting the West Coast of North America. 



C. SUBTUERITA, Carpenter. PI. 58, fig. 47. 



Shell narrow, subcylindrical, consisting of seven moderately 

 convex whorls ; with close oblique longitudinal ribs and revolving 

 striae in the interstices ; yellowish to chocolate-brown ; aperture 

 small, broadly oval, the lip acute and smooth within. 



Length, 4'5 mill. 



Todas Santos Bay, L. California (Hemphill). 

 C. TINCTA, Carpenter. 



An unfigured species, small, turreted, white, longitudinally 

 costate and spirally striate, tinged with reddish orange on the 

 costae ; aperture subquadrate, lip thickened in the middle. 



L. 5 mill., diam. 2 mill. 



Cape St. Lucas, L. California. 



The only specimen I have seen of this species, is not in suffi- 

 ciently good condition for figuring. It is very narrowly cylin- 

 drical, with the aperture very small for the length of the shell. 



C. FUSCOSTRIGATA, Carpenter. 



Shell small, turreted, livid, shining, with a chestnut band ; sub- 

 obsoletely longitudinally ten-ribbed. L. -13, diam. -045 in. 



Cape St. Lucas, L. California. 



Described from a single specimen, which I have not seen. 

 Unfigured. 



C. SERRATA, Carpenter. 



Shell sculptured with undulated, indistinct, longitudinal ribs 

 and revolving striae, under a fimbriated epidermis ; fuscous, 

 maculated with purple. L. '28 in., diam. -13 in. 



Mazatlan to Cape St. Lucas. 

 C. NIGROFUSCA, Carpenter. 



Shell blackish-brown, with subundulated livid lines; whorls 

 flattened, with longitudinal ribs, the interstices and base of body- 

 whorl spirally striate; lip varicose, sinuated behind, dentate 



within. L. *4, diam. '15 inch. 



Mazatlan. 



