TERTIARY INVERTEBRATE FOSSILS. 



CANCER L. 



C. Brewerii, n. s. 



PL 1, Fig. 1. 



Hand shorter, more robust and broader proportionally than 

 that of C. magister, Dana; upper margin flattened and bordered 

 by two well-defined ridges, each bearing about four tubercles; 

 outer surface marked by five nearly obsolete ridges minutely 

 tuberculated ; fingers shorter than in C. magister, the movable 

 one more curved and both with the denticles nearly obsolete. 



Figure, natural size. 



Locality: Near Santa Barbara. Pliocene. Collected by Professor Brewer. 



A single well-preserved hand, and some fragments were found by Professor 

 Brewer, all in one locality, on the Cayeguas Kanch. The hand resembles closely 

 that of the common coast species, in its principal features; but its broader and 

 more robust form, the absence of the marked serration on the back, and the 

 curved finger, sufficiently distinguish it. 



TRIPTERA, Quoy and Gaimard. 



T. CLAVATA, 11. S. 

 PI. 1, Fig. 2. ' 



Shell small, subangulated on the sides, compressed and slightly 

 constricted in the upper part, nearly elliptical in section below, 

 pointed at the tip. Surface smooth or marked by a few very 

 faint transverse undulations. Length about .3 inch. 



PAL. VOL. II. — 2 



