49. CYPRINODOXTID.E - CYPRIXODON. 329 



525. C. vafi-HCfj-ntcis Lac. 



Body short and deep, the back considerably arched. Mouth as in 

 the others, small and terminal, numeral scale 4 times the size of the 

 others. Eye longer than snout, 3} in head, less than interorbital 

 space. Origin of dorsal about midway of body, behind veutrals in old 

 specimens, rather in advance in the young; males with the dorsal fin 

 elevated, but not reaching, when depressed, nearly to caudal. Male 

 fish dusky, with only traces of bars; caudal fin with a dusky bar at 

 base and on posterior edge; tips of dorsal and anal dusky; the scales 

 in the breeding season with small tubercles. Female olivaceous; sides 

 silvery, with darker bars and irregular markings; a dark bar at base of 

 caudal ; a dark spot on posterior part of dorsal. Head 3| ; depth 2. 

 D. 10; A. 10; scales 25; L. transv. 11. L. $ 2.J inches; 9 1^ inches. 

 Cape Cod to Mexico, in brackish waters, entering streams. 



(Lacdpede, Hist. Nat. Poiss. v, 48G: LcMas orinits DeKay, New York Fauna, Fish. 

 215; Giintlier, vi, 305: Cyprinodon bocinns B. & G. Proc. Acad. Nat. Sci. Phila. l>%>5, 

 389: Cyprinodfiii bvriniis Girard, U. S. Mex. B.mml. Surv. Iclith. 07: Cyprinodon borinus 

 Giiuther, vi, 307: Cyprinodon e.dmius Girard, Proc. Acad. Nat. Sci. Phila. 1859, 158.) 



526. C. &iE>boB5S Baird & Girard. 



Similar to the preceding, but the body still deeper and the back and 

 fins still more elevated ; the scales apparently somewhat smaller ; anal 

 much smaller than dorsal ; coloration similar to that of 0. variegatus. 

 Head 2^; depth 1*. D. 10; A. 11; Lat. 1. 28; L. transv. 14. Indi- 

 anola, Texas. (Girard.) 



(Band & Girard, Proc, Acad. Nat. Sci. Phila. 1853, 390; Girard, U. S. Mex, Bound. 

 Surv. Ichth. (i7.) 



527. C. EatafasciaiMS Gariuan. 



Form and dentition of C. gibbosus. Black caudal band much wider; 

 a light baud from middle of opercle to lower half of caudal ; a dark 

 band above this, separated by a narrower band of light from the dark 

 olive of the back ; silvery color of belly separated from the light band 

 on the flanks by a short baud of brown; fins clouded with brown; cau- 

 dal with a narrow dark band across its base and a broad one across its 

 extremity. Head 4 in total length; depth 3. B. 12; A. 11; V. G; P. 

 14; Lat. 1. 30; L. transv. 11. Parras, Coahuila, Mex. (Garman.) 



(Garman, Bull. Mus. Cotup. Zool. viii, No. 3, 92, 1881.) 



52. C. elegasa* Baird & Girard. 



Body more elongate than in any of the preceding; the upper outline 

 of the head less depressed, so that the profile is continuous; fins low, 

 the dorsal quite small; its rays scarcely extending to the beginning of 



