0(34 



ZOOLOGY— FISHES. 



Br. 3 on each side; D. 1-10; A. 1-11; C. 8-1-8-8-1-8; V. 1-8; P. 13; 

 teetli 4.1-5.2. In this specimen, the head enters the total length including 

 caudal fin 4.50 times ; eye entering length of side of head 7 times ; base 

 of anal fin 11.50 in total length. 



Specimen No. 504 A, from same locality, has: Br. 3-3; D. 1-11; A. 

 1-10; C. 8-1-8-8-1-7; V. 1-8; P. 13; teeth4.2-4.2. Head enters totallength 

 4.50 times ; eye in length of side of head 7.75 ; base of anal fin 10.50 of 

 total length. All the individuals of this species which have been examined 

 possess on the end of the snout a little behind its anterior margin and on 

 the median line of the head, a peculiar knob or tubercle, which is more 

 plainly visible in alcoholic than fresh specimens. Gila gracilis possesses it 

 in a much less marked degree. 



No. 



Locality. 



Date. 



Collector. 



45 

 SXXX 



504 



504 A 

 2 A 2 





, 1871 



do 



F. Bischoff. 



Do. 

 H. \V. Henshaw. 



Do. 



Do. 



do 





July. 1873 



... do. 



do 





Sept., 1873 





GILA ELEGANS, Bd. & Gir. 



Gila-elegans, Bd. & Gir., Proc. Acad. Nat. Sci. Phila,, vi, 1853, 309.— Iicl, Sitgreave's 

 Exp. Zuiii & Col. Riv., 1853, 150, pi. ii.— Gir., Proc. Acad. Nat, Sci- 

 Phila., viii, 185G, 205.— Id., U S. & Mex. Bouml. Surv., pt. ii, 1859, Ichthy. 

 ology, (il.— Cope, U. S. Geol. Surv. Terr., 1S70, 441. 



This species, resembling the preceding, but more elongated in form, 

 and having larger scales, has been but sparingly observed by the members 

 of this expedition ; the only specimen having - been brought from South- 

 western Arizona by F. Bischoff of the expedition of 1871. This is in such 

 bad condition that the distinctive characters can hardly be made out. 



No. 



Locality. 



Date. 



Collector. 



54 Z 

 381 A 





, 1871 



, 1874 



p. Bischoff. 

 Lt. R. Birnie. 







