496 Bulletin 47, United States National Museum. 



front, high behind, the last ray more than the height of the first ; last 

 ray of the anal rather long ; caudal with its middle rays about as long as 

 the others. Profusely spotted ; back and sides with round black spots, 

 the spots most developed posteriorly, few on the head, most numerous on 

 the caudal and adipose fin ; sides with pale blotches. Length 30 inches. 

 Upper Rio Grande and southward into the mountains of Chihuahua; 

 abundant in mountain streams. In all respects apparently identical 

 with subspecies pleuriticus, except that the scales are less crowded ante- 

 riorly and the number in a longitudinal series is 155 to 160. (antkoq , spot ; 

 ovpdj tail.) 



Salmo spilurus, COPE, Hayden's Geol. Surv. Mont., 1871 (1872), 470, Sangre de Cristo Pass, 



Colorado. 

 Salmo mykiss spilurus, JORDAN, Bull. U. S. Fish Comm., ix, 1889, 14, pi. 3, figs. 7 and 8. 



Represented in the Colorado River Basin by 



779g. SALMO MYKISS PLEURITICUS (Cope). 

 (COLORADO RIVER TROUT.) 



Opercle short, 4f to 5 in head. Scales small, 185 to 190. Close to the 

 typical myMss, but the black spots chiefly gathered on the posterior part 

 of the body, the head nearly immaculate ; extremely variable, the 

 lower fins usually red, but sometimes orange ; usually a red lateral band. 

 Basin of the Colorado. A large, handsome, and variable trout, some- 

 times profusely speckled, sometimes with large spots, and occasionally 

 with strong golden shades. Abundant throughout western Colorado 

 and in all clear mountain streams throughout Arizona j specimens from 

 the Colorado Chiquito similar to those from the Eagle and the Gunnison, 

 in Colorado, (pleuriticus, from Trfovpov, side, in allusion to the red lateral 

 band. ) 



Salmo pleuriticus, COPE, Hayden's Geol. Surv. Mont., 1871 (1872), 471, head waters of Green 



River, Wyoming. 

 Salmo mykiss pleuriticus, JORDAN, Bull. U. S. Fish Comm., ix, 1889, 14, pi. 2, fig. 6. 



Represented in Waha Lake by 



779h. SALMO MTKISS BOUVIERI (Bendire). 

 (WAHA LAKE TROUT.) 



Head 4; depth 4; eye 4. D. 10; A. 11; B. 12; scales 175. Max- 

 illary 2 in head. Size small. Similar to S. myMss, but with dark spots 

 only on the dorsal, caudal, and adipose fin, and on the tail behind front 

 of anal, where the spots are very profuse, smaller than pupil. Anterior 

 regions dusky-bluish, not silvery ; red blotch on inner edges of dentary 

 bones below very conspicuous. Head shorter and deeper than in mykiss, 

 the snout shorter and blunter, not longer than eye. Opercle and pre- 

 opercle less convex than in myUss. Caudal moderately forked. A singu- 

 larly colored local variety, found in Waha Lake, Washington, a mountain 

 lake without outlet. (Named for Captain Bouvier.) 



Salmo purpuratm bouvieri, BENDIRE, in JORDAN & GILBERT, Synopsis, 315, 1883, Waha Lake, 



Washington. (Coll. Capt. Charles Bendire, U. S. A.) 

 Salmo mykiss bouvieri, JORDAN, Bull. U. S. Fish Comm., ix, 1889, pi. 4, fig. 10. 



