PLECTOSPONDYL1— CYPEINLDAE— GILA GRAHAMIL 665 



GILA GRACILIS, Bd. & Gir. 



Gila gracilis, Bd. & Gir., Proc. Acad. Nat. Sci. Phila., vi, 1853, 369. — lid., Sitgreave's 

 Exp. ZuQi & Col. Riv., 1853, Fishes, 151, pi. iii.— Gm, Proc. Acad. Nat. 

 Sci. Phila., viii, 1S56, 205.— Bd. & Gir., P. R, R, Rep., x, 1859, Fishes, 

 287.— Gir., U. S. & Mex. Bound. Surv., pt. ii, Ichthyology, 1859, 61.— Cope, 

 U. S. Geol. Surv. Terr., 1870, -441. 



A number of specimens of this species have been obtained which cor- 

 respond very nearly with the description given by Baird and Grirard. 



In two specimens, 570 and 571, from White Eiver, Arizona, the teeth 

 formula? are as follows: 4.2-5.2 — 5.2-5.2. The head enters total length 4.25 

 times; the eye in length of side of head 6 times ; the base of anal fin 9.25 

 times of total length including caudal. Radii : D. 2-9 ; A. 3-9 ; C. 8-1-10-8- 

 1-11; V. 1-9; P. 16. This species is intermediate in form between Gila 

 robusta and Gila elegans, and the scales are smaller than either ; is found 

 abundant in many of the deep pools of streams of Arizona; is sluggish in 

 habits, and may be readily taken by hook baited with almost any sub- 

 stance, pork, grasshopper, or even a piece of fish. Many were taken by 

 seine also. Are an excellent food fish, flesh being firm, but so full of bones 

 as to render it hazardous to eat without care. These fishes are extremely 

 hostile to the trout (Salmo pleuriticus), driving them and other fishes to the 

 shallower and more rapid parts of the streams if they approach them. No 

 female taken in roe. 



No. 



Locality. 



Date. 



Collector. 



570 

 606 

 571 





Aug.i2,iS73 

 Aug.23.1S73 



di 



II. W. Henshaw. 



Do. 

 Do. 



do 



do 



GILA GRAHAMII, Bd. & Gir. 



Gila grahamii,Bv>. & GlR., Proc. Acad. Nat. Sci. Phila., vi, 1853, 389. — GlR., Proc. 

 Acad. Nat. Sci. Phila., viii, 1850, 205.— Id., U. S. & Mex. Bound. Surv., x, 

 pt. ii, Ichthyology, 1859, 61, pi. xxiv, figs. 7-12. — Cope, U. S. Geol. Surv. 

 Terr., 1870, 441. 



A number of specimens of this beautiful species was secured during 



the expedition in different parts of Arizona and New Mexico ; notably in 



the White River, near Camp Apache, a branch of the Gila. After an exam- 



