666 



ZOOLOGY— FISHES. 



inaticm of specimens, they have been found to correspond better with 

 Grirard's description than any other species of this genus. Is found abundant 

 in same stream as preceding. 



No. 



Locality. 



Date. 



Collector. 



64 



65 

 5 

 653 c 

 653 AC 



43 



54 

 204 A 

 1269 

 910 





June, 1S73 

 do 



Dr. 0. Loew. 



Do. 

 Dr. C. G. Newberry. 

 Dr. 0. Loew. 

 H. W. Henshaw. 

 Jas. M. Rutter. 

 H. W. Henshaw. 

 Dr. J. T. Rothrock. 

 Jas. M. Rutter. 

 Dr. J. T. Rothrock. 



do 





July, "873 



Aug. 29, 1873 

 do 



White River, Ariz 



do 



do 



July, 1S74 

 do 







do 





Aug., 1874 

 do 



(?) 



GILA NACREA, Cope. 



Gila nacrea, Cope, U. S. Geol. Surv. Terr., 1S70, 441. 



This species is closely allied to the foregoing, but differs in a less 

 depressed cranium and much larger eye. The head is very nearly like that 

 of Ccratichtliys and other ordinary Cyprinidce. From Green River, Wyo- 

 ming. 



GILA SEMINUDA, Cope & Yarrow, sp. nov. 

 Plate XXXI, Figs. 1, la. 



This species is established upon a number of specimens secured from 

 the Rio Virgen River, an affluent of the Colorado ; the exact locality where 

 taken being a little south of Washington, Southern Utah. The species is 

 by no means scarce, as several hundreds were observed captured by boys 

 with hook and line. This species is closely allied to G. nacrea, Cope, but 

 has a larger eye and shorter head. 



Radii: D. 2-10; C. 34; A. 1-10; V. 10; R 15. Teeth, 5.2-2.4. 

 Scales, 21-12, small and subcircular; none on belly. Length of head 5 

 times in total length, inchiding caudal. Depth at dorsal fin 5.75 of total 

 length. Ventral fins originating slightly in advance of dorsal fin. Least 



