Jordan and Ever maun. Fishes of North America. 499 



times it is similar in quality to other trout. In streams where it is resi- 

 dent, it rarely exceeds 5 or 6 pounds. Resident forms seem to pass into 

 *' irideus" southward and should be carefully compared with the latter; 

 northward into '' kamloops," while in the Lower Snake River it seems to 

 iutorgrade with mykisSj through the form called gibbsii. In the Lower 

 Columbia, according to Dr. Gilbert, it is well separated from mykiss on the 

 one hand and from the non-migratory S. irideus masoni on the other. Both 

 young and old are there well separated from iridem. (Named for Dr. 

 Gairdner, its discoverer, an employee of the Hudson Bay Company at Fort 

 Vancouver, mentioned by Richardson as an able and promising young 

 naturalist.) 



Salmo gairdneri, RICHARDSON, Fauna Bor.-Amer., in, 221, 1836, Columbia River at Fort 



Vancouver; SUCKLEY, Mouogr. Salmo, 114, 1861 (1874); GUNTHER, Cat., vi, 118, 1866. 

 Salmo Irwicalus, SUCKLEY, Ann. Lye. Nat. Hist. N. Y.,3, 1858, New Dungeness, Straits of 



Fuca ; GUNTHER, Cat., vi, 122, 1866. 

 Fri aurora, GiRARD, Proc. Ac. Nat. Sci.Phila., 1856, 218; GIRARD, Pac. R. R. Surv., x, 308, pi. 



68, 1858, Astoria, Oregon. (Coll. Trowbridge.) 

 Fario newberryi, GIRARD, Proc. Ac. Nat. Sci.Phila., 1858,224, Klamath River; specimen with 



scales, 36-146-33. 



Fario gairdneri, GIRARD, Pac. R. R. Surv., x, 313, 1858. 

 Salmo purituratn, GUNTHER, Cat., vi, 116, 1866. 



Represented in the lakes of British Columbia and northern Wash- 

 ington by 



780a. SALMO GAIRDNERI KAMLOOPS (Jordan). 

 (KAMLOOPS TROUT; STIT-TSE.) 



Head 4* ; depth 4i; eye 4*. D. 11 ; A. 11 or 12 ; scales 30-135 to 146-26, 

 65 scales before the dorsal. Body elongate, somewhat compressed, the 

 maxillary extending beyond the eye, its length not quite half the head; 

 snout slightly rounded in profile, the profile regularly ascending ; eye 

 large, about as long as snout ; teeth moderate, some of those in the 

 outer row in each jaw moderately enlarged ; opercles striate, not much 

 produced backward ; branchiostegal rays 11 on each side ; dorsal fin 

 rather low, its longest ray slightly greater than the base of the fin, If in 

 head ; anal fin rather larger than usual in trout, its outline slightly con- 

 cave, its longest ray greater than the base of the fin and a little more 

 than half head; adipose fin moderate; caudal fin rather broad, distinctly 

 forked, its outer rays about twice inner ; pectoral fins rather long, 1 in 

 head ; ventrals moderate, If in head ; gill rakers comparatively short and 

 few in number, about 6 + 12 or 11. Coloration dark olive above, 

 bright silvery below, the silvery color extending some distance below the 

 lateral line where it ends abruptly; when fresh, the middle of the sides in 

 both specimens was occupied by a broad band of bright light-rose pink, 

 covering about one-third of the total depth of the fish ; back above 

 with small black spots about the size of pin heads irregularly scattered 

 and somewhat more numerous posteriorly; a very few faint spots on 

 upper part of head ; dorsal and caudal fins rather closely covered with 

 small black spots similar to those on back but more distinct ; a few spots 

 on the adipose fin, which is edged with blackish ; lower fins plain ; the 



