330 CONTRinUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
tlie caudal i)eduncle. Oluish black, sides somewhat variegated with 
darker, the males somewhat sjmtted ; edge of caudal liu black iu the 
male; a black patch ou last rays of dorsal iu tlie female. Head 3^ ; 
dei)th '2 to 3. J>. 11 ; A. 10; scales Ud-lU. L. inches. Kio Grande. 
{(! Irani.) 
(I5;iiid A Girard, Proc. Acad. Nat. Sci. Pliila. 18.'S3, 389; Girard, U. S. Mex. Rournl. 
Surv. Iclilli. 03.) 
5‘2i>. C. ccalifoB’iiietisis Grd. 
“ It may be easily distinguished from its congeners in North America, 
by its uniform system of coloration which exhibits neither bands nor 
spots. The general aspect of its body is rather short and deep, excei)t 
in the young which assume a snbfnsiform 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 abrn[)tly rounded off. The month is, proportionally speaking, 
of medium size, Avhikst 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 tin 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 tin is nearly as large as the dorsal, deeper than long, 
inferiorly convex, 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; Y. 7 ; P. 12. The scales are much deei)er 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.')9, 157.) 
530. C. 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 ; tins 
rather small. IIead3||; depth 2-2Y D. 10; A. 11 ; scales 2G-9. L. 3 
inches. Ilio Gila. (Girard.) 
(B. &. G. Proc. Acad. Nat. Sci. Phila. 1853, 389; Girard, U. S. Mex. Bound. Surv. 
Ichlh. ti8.) 
531. C. cai'pio Giiiither. 
Slenderer than G. rariegaius ; humeral scale scarcely larger than the 
others ; dorsal tin inserted slightlj’ behind ventrals ; eye 3^ iu head, a 
