[or dan and FA'crmann. — Fishes of ^'orih ^imerica. 673 



Kepresenled iu the Florida Keys and Cul)a by 



985a. CYPRINODOX VAUIEOATLS RIVERKNDI (Pooy). 



Head 3^ ; depth 2. D. 10 ; A. 9 ; scales 24-12. This form is very close 

 to the form described as C. f/ihhosnn, but with larger scales and the anal 

 edged Avitli black. Male in life with the antedorsal region lustrous steel 

 blue, the rest of thel)ody olivaceoiis, obscurely clouded, but without dark 

 crossbars ; a black bar at base of dorsal ; a dark shade below eye ; anal and 

 caudal edged with black; ventrals and anal red; dorsal dusky, edged 

 with orange ; pectoral jilaiu, tipped with orange and blackish. Female 

 more silvery, the back olivaceous and speckled; the sides with about 13 

 blackish bars, which do not reach the back ; these alternately broad and 

 narrow ; no yellowish shades ; a dusky bar tlirougli eye ; lower fins whit- 

 ish ; upper pale ; dorsal fin with a black ocellus ; dark band across base 

 of caudal. Length 2^ inches. Cuba and Florida Keys. Rather common 

 at Key \Yest in shallow waters near the shore. (Named for M. L. Kiver- 

 end, a naturalist in Havana. ) 



Trifarcius* riferemU, PoEY, Memorias, ii, 30G, 18G1, Havana. 

 Oijprinodon riverendi, J ORJ>\yi, Proo. U. S. Nat. Mus., 1881, 100. 



<.)S6. rYPRINOnOX EXIMIUS, Giraid. 



Head 3J; depth nearly 2 ; eye 4 to 41 iu head. D. 11 or 12; A. 9 to 11. 

 Head large; anterior profile more arched than in C. varicf/alu.s; back very 

 convex. Insertion of dorsal over that of ventrals, slightly nearer base 

 of caudal than tip of snout. Mouth small, the lower jaw prominent. 

 Male dark, nearly plain, the base of caudal with many longitudinal black 

 spots, which do not form a crossbar; the fin with a broad black tip, 

 before which is a rather broader pale bar; dorsal fin light yellow, its 

 base dusky ; lower fins plain or slightly dusky. Female without black 

 on tip of caudal, but with a black spot on dorsal behind; females and 

 young with black crossbars. Leugth 2i inches. Chihuahua River. 

 Close to C. variegatus, but difiering in the color of the caudal and in the 

 larger aud more arched head. Our specimens from Rio de los Conchos, 

 obtained by Mr. Woolman. (exmhifi, choice, excellent.) 



Cifprinodon eximuiK, Giuaed, Proc. Ao. Nat. Sci. Pliila., ISVJ, 15S, Chihuahua River ; Jordan 

 & CiLBERT, Synopsis, 890, 1883. 



9S7. CYPRINODON BOVINUS, Baird & Giiaid. 

 Head 3; depth about 2i ; eye 4 iu head. D. 9 ; A. 8; scales (in figure) 

 24. Apparently very similar to C. cximius, about equally deep, T)ut said 

 to have a larger head, the ventrals under the front of the dorsal. 

 Male uniform blackish above, the fins unicolor except the caudal 

 which is tipped with black, its base unspotted; female with the sides 

 blotched, the fins plain, except for the dorsal ocellus. Leon Spring, in 

 southwestern Texas. (Girard.) (?Jori«H.s, like a bull.) 



Cijprinodon hofimis, Baird & Girard, Proc. Ac. Nat. Sci. Phila., 1S53, 389, Leon Spring, TexaS; 

 (Coll. Clark); Girard, U. S. Mex. Bound. Surv., lehth., 67, pi. 37, ligs. 12-18, 1859. 



*Tho nominal <teuus, Trifarcius, based on tlio presence of 6 branchiostosals, is identical with 

 Cyprinodou; the same number being found in Cijprinodon varieyalus, contrary to the statement of 

 Valenciennes. 



F. N. A. 44 



