242 CTPEINXD-I!. 



upper jaw scarcely overlapping tlio lower ; the maxillary extends 

 beyond the vertical from the front margin of the orbit. Interorbital 

 space broad. The origin of the dorsal fin is nearer to the root of the 

 caudal than to the end of the snout ; and behind the origin, of the 

 ventrals. Caudal fin deeply forked. Pectorals terminating at a 

 great distance from the ventrals. Coloration uniform. - 



Pharyngeal teeth 5 . 2 — 2 . 4. {Girarcl.) 



Zuni River. Five and a half inches long. 



The following fish appears to be allied to the preceding species, or 

 at least to those which have been named Gila. I give the essential 

 characters as far as they have been made known by Pallas : — 



Cyprinus leptocephalus. 



Pallas, Itin, iii. Append. 3. p. 703 ; Nov. Act. Petropol, i. p. 357, 

 tab. 11. fig. 10 ; Zoogr. Ross.- As. iii. p. 312. 



D. 9. A. 10. 



Scales small. The lateral line runs along the lower part of the 

 body and tail. Dorsal fin opposite to the ventrals. Body oblong. 

 Head with the snout depressed, much produced, the lower jaw pro- 

 jecting beyond the upper ; the cleft of the mouth does not extend 

 backwards to below the eye. Barbels none. Gill-openings wide. 

 Abdomen not compressed. Caudal fin deeply forked. All the fins, 

 except the dorsal, reddish, or red. 



"In Onone et Ingoda fluviis ; magnitudo trispithamaHs, imo 

 ulnaris." 



42. Leuciscus grahami. 



Gila grahami, Baird <§- Girard, I'roc, Ac. Nat. Sc. Philad. 1853, 

 p. 389; 1856, p. 205; U. S. ^ 3fex. Bomid. Ichthyol. p. 01, pi. 24. 

 figs. 7-12. 



D. 2/10. A. 2/10. 



Scales small. The upper profile of the head is concave, the back 

 being somewhat elevated ; snout produced, with the upper jaw a 

 little longer than the lower. Mouth wide, the maxillary reaching 

 to the vertical from the front mai-gin of the eye. The free portion 

 of the tail is low and elongate, its depth being about one-third of 

 its length. The origin of the dorsal fin is a little behind that of the 

 -ventrals, and somcAvhat nearer to the root of the tail than to the 

 end of the snout. Caudal fin forked. Coloration uniform. {Girard.) 



Bio San Pedro, tributary of Rio Gila. 



43. Leuciscus emorii. 



Gila emorii, Baird 8,- Girard, Proc. Ac. Nat. Sc. Philad. 1853, p. 388 ; 

 185G, p. 205 ; U. S. 8fMex. Bound. Ichthyol. p. 02, pi. 33. figs. 5-10. 



D. 3/9. A. 2/10. 

 Scales small. Profile of head continuous with that of the body, 

 and gradually tapering from the nape to the snout. Mouth nearly 

 terminal. The maxillary docs not reach to the fi'ont margin of the 



