1906.] 



NATURAL SCIENCES OF PHILADELPHIA. 



295 



<"y\ 



Fig. 1. — Pyrrhtdina lata (Cope). 



Copeina argyrops (Cope). Fig. 2. 



Pijrrhnlinn argyrops Cope, Proc. Amer. Philos. Soc. Phila., XVII, 1877-78 

 (May 17, 1878), p. 694. Nos. 21,441 (type) and 21,442. A. N. S. P., 

 cotypes. Peruvian Amazon. Prof. J. Orton. Coll. of 1877. 



About 11? scales (according to pockets) before dorsal; width of 

 head If in its length; interorbital space 2\. Edges of body rounded. 

 Head broadly depressed or flattened above and becoming somewhat 

 constricted below. Snout broadly flattened above. Surface or man- 





-i::^' 



V-^^^ 



Fig. 2. — Copeina argyrops (Cope). 



