330 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



the caudal peduncle. Bluisli 151ack, sides somewhat variegated with 

 darker, the males somewhat spotted ; edge of caudal hu black iu the 

 male; a black patch on last rays of dorsal in t be female. Head 3^; 

 depth 2 to 3. D. 11 ; A. 10; scales 2G-12. L. 2i inches. Eio Grande. 



(Girard.) 



(Baird & Girard, Proc. Acad. Nat. Sci. Pbila. 1853, 389; Girard, U. S. Mex. Bound. 

 Surv. Ichtli. G3.) 



529. C calafoa'BjieEasis Grd. 



" It may be easily distinguished from its congeners in North America, 

 by its uniform system of coloration which exhibits neither bauds nor 

 spots. The general aspect of its body is rather short and deep, except 

 iu the young which assume a subfusiform appearance. The largest 

 specimens which we have examined measure about an inch and a half 

 in total length. The head constitutes the fourth of the length, the snout 

 being abruptly rounded off. The mouth is, proportionally speaking, 

 of medium size, whilst the eye is rather small, subcircular ; its diameter 

 entering three times and a half in the length of the side of the head. The 

 dorsal fin is higher than long, and superiorly convex ; its interior margin 

 being nearer the apex of the snout than the posterior margin of the 

 caudal. The anal fin is nearly as large as the dorsal, deeper than long, 

 interiorly c(mvex, particularly upon its posterior half. The caudal is 

 posteriorly truncated, nearly linear. The ventrals are small, project 

 beyond the vent and reach almost the origin of the anal. The pectorals 

 are well developed, rounded off, extending as far as a vertical line drawn 

 at the insertion of the ventrals. The rays are : D. 10 + 1 ; A. 11 ; C. 

 3, 1, 8, 8, 1, 3; V. 7; P. 12. The scales are much deeper than long, 

 anteriorly truncated and posteriorly rounded off or convex. The color 

 is olivaceous brown, with a dark grayish tint along the back, and a 

 golden tint beneath." (Girard.) San Diego, California. 



(Grd. Proc. Acad. Nat. Sci. Phila. 18."i9, 157.) 



530. C. liiacuSa,riais Baird & Girard. 



Apparently very similar to C. variegatus ; the female dark above, 



with dark bars on the sides and a dark shade across the dorsal fin ; fins 



rather small. Head 3§ ; depth 2-2^. D. 10; A. 11 ; scales 2G-9. L. 2 



inches. Eio Gila. (Girard.) 



(B. & G. Proc. Acad. Nat. Sci. Phila. 1853, 389; Girard, U. S. Mex. Bound. Surv. 

 Iclitb. 08.) 



531. C. cai'pio Giiutber. 



Slenderer than C. variegatus; humeral scale scarcely larger than the 

 others j dorsal fin inserted slightly behind ventrals ; eye 3^ in head, a 



