212 PALEONTOLOGY OF CALIFORNIA. 



NATICA, Adanson. 



N". Uvasana, n. s. 



PI. 32, Fig. 277. 



Shell small, subglobose ; spire somewhat elevated ; whorls 

 four; suture distinct; mouth subcircular; inner lip incrusted 

 above ; umbilicus somewhat open, with a small revolving callus. 

 Surface smooth, showing a few lines of growth. 



Figure, magnified. 



Locality: Near Fort Tej on ; Dr. Horn. 



SCALARIA, Lam. 



Subgen. OPALIA, II. and A. Ad. 



S. Mathewsonii, n. s. 



PI. 32, Fig. 278. 



Shell robust, turriculate; whorls numerous, convex; suture 

 distinct. Surface marked by about eighteen or twenty large ribs, 

 with broad, convex interspaces, crossed by fine revolving lines ; 

 lower angle of the body whorl bordered by a prominent rib, the 

 lower surface being flattened and marked only by strise similar to 

 those on the sides of the whorl. Mouth subcircular, truncated 

 below. 



Figure, natural size. 



Locality: A single specimen, from near Martinez ; collected by Mr. Mathcwson. 



TURRITELLA, Lam. 



T. INFRA-GRANULATA, II. S. 

 PI. 32, Fig. 279. 



Shell elongated, tapering, scalariform; whorls numerous, 

 sloping straight, or somewhat concavely outwards above, anga- 





