ICHTHYOLOGY. 



67 





2. CYPRINODON GIBBOSUS, B. & a. 



Plate XXXVIII, Figs. 1—7. 



Spec. Char — General form sub-elliptical, the dorsal region arched in both sexes. The nape often depressed or sub-concave. 

 The head is rather small, entering four times and a half in the total length. The eye is large ; its diameter is a little more than 

 the third of the side of the head. The dorsal fin of the male is higher than long, that of the female somewhat longer than 

 high. The caudal is sub-truncated posteriorly, and enters about six times and a half in the total length. The anal fin is less 

 deep and more rounded exteriorly than in C elegans. The origin of the ventrals is likewise placed somewhat more posteriorly 

 with reference to the anterior margin of the dorsal. The pectorals are more elongated also than in the latter species. 



Syn. — Cyprinodon gibbosus, B. & G. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 390. 



The dorsal region, the head, and dorsal fin are of a uniform bluish black in the male ; the 

 ventral region is golden yellow. The caudal fin is posteriorly margined with black ; the anal, 

 ventrals, and pectorals being yellow. The female exhibits vertical bars of black on the side of 

 the body. The fins are unicolor, except the dorsal, which is provided posteriorly with a black 



D 10 ; A 11 ; C 4, 1, 8, 7, 1, 3 ; V 5 ; P 15. 



Plate XXXVIII, fig. 1, represents the male sex of Cyprinodon gibbosus, size of life. Fig. 2 

 exhibits its teeth. Fig. 3, an outline from above. Fig. 4, a section of the body. Fig. 5 is 

 the female sex, also size of life. Fig. 6, an outline from above. Fig. 7, a section of the body. 



List of specimens. 



Catal. 

 No. 



1 No. of 

 spec. 



Sex. 



Locality. 



When 



collected. 



Whence obtained. 



Nature of 

 specimen. 



Collected by — 



684: 



C85 



15 



10 



c? 



9 



Indianola, Texas 



do 



1851 

 1851 



Col. J. D Graham 



A 1 eo ho lie . 

 ....do.... 



John 11. Clark 



do 



3. CYPPJNODON BOVIXUS, B. & G. 



Plate XXXVII, Figs. 12—18. 



Spec. Char. — General form sub-elliptical ; dorsal region arched in both sexes. Head rather largre, constituting the third of 

 the length, the caudal fin excluded. The eye is moderate sized ; its diameter entering four times in the length of the side of 

 the head. The anterior margin of the dorsal fin is equidistant between the extremity of the snout and the insertion of the 

 caudal fin ; it is higher than long in the male, and lrnger than high in the female. The caudal, which enters sev« u times in 

 the total length, is sub-truncated posteriorly. The anal is shorter than in C. elegans, and inserted somewhat more oackwards. 

 The origin of the ventrals is placed opposite the anterior margin of the dorsal fin. 



Syn.— Cyprinod on bovinus, B. & G. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 389. 



The male is uniform blackish brown above, olivaceous beneath ; the fins being unicolor, 

 except the caudal, which has its posterior margin black. The female has the lower portion of 

 the flank irregularly maculated ; the fins being unicolor also, except the dorsal, which exhibits 

 a black spot at its posterior margin. 



D 9 ; A 8 ; C 6, 1, 7, f>, 1, 5 ; V 6 ; P 14. 



Plate XXXVII, fig. 12, represents the male sex of Cyprinodon hovimis, size of life Fig. 13, 

 its teeth. Fig, 14, an outline from above. Fig. 15, a section of the body. Fig. 16, the female 

 «ex of the same species. Fig. 17, a section of the body. Fig. 18, an outlic from above. 



