252 NKW YORK STATE MUSEUM 



hatcheries, estimates the total loss between impregnation of 



the eggs and feeding of the fry as about 40^'?^. After the fry 



begin to feed, they are not more dilfieult to rear than brook 



trout. 



134 Salmo gairdneri Richardson 



SteelJiead; Gairdnei^'s TrotU; Salmon Trout (Introduced) 



Salmo gairdnerii Richardson, Fauna Bor.-Amer. Ill, 221, 1836, Columbia 



River. 

 Fario gairdneri Gikaed, Pac. R. R. Surv. Fishes, 313, pi. LXXI, fig. 1, 



1858. 

 Salmo purpuratus Gunther, Cat. Fish. Brit. Mus. YI, 116, 1866, not of 



Pallas. 

 Salmo gairdnerii Gunther, op. cit. 118, 1866. 

 Salmo gairdneri Jordan & Gilbert, Bull. 16, U. S. Nat. Mus. 313, 1883; 



Bean, Bull. U. S. F. C. IX, 198, pi. XLIX, fig. 9, 1891, not fig. 10. 



which is young mykiss: .Jordan & Evermann, Bull. 47, U. S. Nat- 



Mus. 498, 1896, pi. LXXXI, fig. 215, 1900; Cheney, Third Ann. Rept. 



N. Y. Comm. Fish. 241, color pi., 1898. 



Form of S. s a 1 a r . Body elongate, little compressed, its 

 greatest depth two ninths of the total length without caudal; 

 caudal peduncle short, its least depth three sevenths of length of 

 head; head rather short, one fifth of total length without 

 caudal, maxilla reaching far behind the eye, its length one half 

 the length of head; eye small, two thirds of length of snout, 

 two elevenths as long as the head; teeth rather small, vomerines 

 in two long, alternating series about as long as the palatine 

 series; gill rakers short and stout, about 20 on the first arch, of 

 which 12 are below the angle; dorsal origin much nearer to tip 

 of snout than to base of caudal, base of dorsal two thirds of 

 length of head, longest dorsal ray one half the length of head 

 and twice as long as last ray; adipose fin very small and nar- 

 row, over the beginning of the anal; caudal fin moderately 

 forked in the young; ventral origin midway between tip of 

 snout and base of caudal, ventral fin one half the depth of body; 

 nnal base one half as long as the head, longest anal ray equal to 

 postorbital ])art of head; pectoral fin one eighth of total length 

 witlioMf caudiil. 15. 11 or 12; D. 11; A. 12. Scales from 137 to 

 177. usually about 150-28; pyloric caeca 42; vertebrae 38+20= 

 58. Color olive green above, sides silvery, head, back, dorsal 



