ICHTHYOLOGY. 



73 



The color is dark reddish brown above ; yellowish beneath, with an oblique dark streak 

 across the cheek beneath the orbit. The caudal fin is occasionally barred. 



D Y ; A 10 ; C 3, 1, Y, 6, 1, 2 ; V 6 ; PH. (Female.) 



Do. ; 



7; 



do. 



? 



do. ; do. (Male.) 



Plate XXXIX, fig. 1, represents the female sex of Gambusia patruelis, size of life. Fig. 2, 

 an outline from above. Fig. 3, an ideal section of the body. Fig. 4, the male sex of the 

 same species, size of life. Fig. 5, an enlarged view of its mouth, showing its dentition. Fig. 

 6, an outline from above. Fig, 7, a cross section of its body. 



List of specimens. 



Catal. I No. of 



No. 



672 

 673 



674 

 675 

 676 



spec 



12 

 4 

 6 

 3 



1 



Locality. 



Rio Sabinal, Texas. 

 Rio Leona, Texas. 

 Rio Nueces, Texas 

 Elm creek, Texas. 



Turkey creek, Texas 



When col- 



lect ed . 



1851 

 1851 

 1851 



1851 

 1 85 1 



Whence obtained. 



Col. J. D. Graham... 



do 



do 



do 



do 



Alcoholic 



do 



do. 

 do. 

 do. 



Nature of 

 specimen. 



Collected by 



John H. Clark 



do 

 do 

 do 

 do 



GIRARDINUS OCCIDENTALS, Grd. 



Plate XXXIX, Figs. 16—19. 



Spec. Char. — Body slender and elongated, dorsal region sub-convex. Head rather sraall and conical, constituting" somewhat 

 more than the fifth of the entire length. The dorsal fin is small and narrow ; its anterior margin being a little nearer the 

 extremity of the snout than the posterior edge of the caudal fin. The anal resembles the dorsal in size and shape. The ventral 

 fins are very small and short, and the pectorals rather broad and moderate sized. 



SYN.—Heterandria occidentalism B. & G. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 390. 



The color above is reddish brown ; beneath reddish yellow. A black streak may be observed 



along the ventral line and under the peduncle of the tail. The fins being unicolor, of a light 

 yellowish tint. 



D 6 ; AT; 4, 1, ?* 6, 1* 8 ; V6; P 10. (Female.) 

 Plate XXXIX, fig. 16, represents the female sex of Girardinus occidentalism size of life. 

 Fig. 17, a front view of its mouth, magnified, showing the teeth. Fig. 18, an outline from 

 above. Fig. 19, a cross section of the body. 



List of specimens. 



Catal. No. of 



No. 



spec. 





Locality 



When col- 

 lected. 



Whence obtained. 





Nature of 

 specimen. 



671 



5 



Eio Santa Cruz, Mexico 



1851 



Collected by 



Col. J. D. Graham Alcoholic . 



John H. Clark 



Family CH AR ACINID AE . 



The body is scaly, and the majority of the fishes of this family have, in addition to the dorsal 



fin, an adipose finlet. 



mouth 



10 



l 



