172 CONTRIBUTION'S TO NORTH AMERICAN ICHTHYOLOGY - IV. 



$ .Si-air-; di-i-prr tlian 1'Hi^. MTV closely imbricated along sides of tlic body. 

 Teeth -1-4. 



t Ed^rs o! ti-.-th i-ntin-. (Cndoma.*) 



{Trrth \\iih grinding surface developed. 



223. C. iris (Cope) J. & G. 



Body deep, compressed, as in Cyprinella. Dorsal outline well arched. 

 Month moderate, oblique, the jaws subequal. Eye moderate, 4 in head. 

 Scales very narrowly exposed on the sides, the lateral Hue decurved. 

 Seventeen rows of scales in front of dorsal fin, which is inserted behind 

 veutrals; pectoral fin reaching ventrals; veutrals reaching anal; dorsal 

 and caudal short. Males in spring with the snout in 1'rout tuberculate. 

 Color bright, clear green above; a green baud extending down behind 

 operculuin ; head and belly verinilion-red j a large, square vermilion spot 

 behind the green scapular stripe. Lower fins crimson ; caudal vermil- 

 ion ; dorsal olivaceous, unmarked. Females plain olivaceous and sil- 

 very. Head 3 ; depth 3. D. 8 ; A. 9 ; scales 5-33-3 ; teeth 4-4. L. 

 2.J inches. Upper Bio Grande. The most brilliantly colored fish in 

 New Mexico. (Cope.} 



(/////>*;.',>* <YM (.'op.-, Wheeler's Espl. W. 100th Mer. v, G53, 1376.) 



224. C. jiigaBis (Cope) J. & G. 



Form stout, compressed. Back much elevated, descending steeply to 

 the end of the muzzle. Upper jaw rather the longer, maxillary reach- 

 ing beyond the front of the orbit. Eye moderate, 4 \ in head. Pectorals 

 nearly reaching ventrals. Sides and lower fins milky white; a dusky 

 shade on dorsal fin ; a broad dark vertical bar behind head ; a dnsky 

 shade on the side between ventrals and anal. The coloration, therefore, 

 essential'y that of the species of the group Photof/enis. Head 4; depth 

 3. 1). X; A. !; scales 7-.">l-l; teeih \-[ (said to be 1, 4-4, 1 in young 

 specimens), with rather narrow grinding surface. L. 2i inches. Mis- 

 souri River and Arkansas River. (Cope.) 



i Jiii/tilix Copr, I lav ilt-n'.s (Ji-ol. Surv. Wyoin. for 1^70, 1^7'J, 4:>9.) 



\\iilmiit ^rimlin.i; siirt'.-n-i-. 

 a. J)or>:il I'm iiiM-rli-d notably behind vi-nlnils ; brad very short anil blunt, al- 

 IIHI-! ronii'l. 



<'. vittafa (Crd.) J. & G. 

 I'.ody I'ather stout, heavy anteriorly, with long caudal peduncle; the, 

 back not arched. Head blunt and heavy, lnt less gibbous than in C. 

 oniti/n. Month moderate, quite oblique, the maxillary not reaching to 

 the eye. Kye rather small, nearly ." in head. Scales rather small. 



* Girard, Proc. Aca-1. \a t . Sci. Phila. 1856, 194 : type Codoma vittata Grd. (A coin. .1 

 name.) 



