242 CTPEINIDiE. 



upper jaw scarcely overlapping the lower; the maxillary extends 

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

 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 unifoiTa. 



Pharj-ngeal teeth 5 . 2—2 . 4. (Girard.) 



Zuni Eiver. 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 ; Kov. Act. Tetropol. i. p. 357, 

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

 D. 9. A. 10. 

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

 body and taU. 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. 



" Tn Onoue et Ingoda fluviis ; magnitude trispithamalis, imo 

 ulnaris." 



42. Leuciscus grahami. 



Gila grahami, Baird 8j- Girard, Froc. Ac. Nat. Sc. PMlad. 1853, 

 p. 389 ; 1856, p. 205 ; U. S. ^ Mex. Bound. Ichthjol. p. 61, 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 nj^per jaw a 

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

 to the vertical from the front margin 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 somewhat nearer to the root of the tail tlian to the 

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



Eio San Pedro, tributary of Eio Gila. 



43. Leuciscus emorii. 



Gila emorii, Baird 8f Girard, Proc. Ac. Nat. Sc. Pliiktd. 1853, p. 388 ; 

 1856, p. 205 ; f/. ,S'. S,- Mex. Boxmd. IcJdhyol. p. 62, 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 does not reach to the front margin of the 



