316 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY — IV. 

 Var. stomias (Cope) J. & G. 



Body sliort and stout. Head large and wide, above broad and flat, 

 without keel, with wide mandible and mouth, the end of the maxillary 

 extending half the diameter of the eye beyond the orbit. Eye 4| in head. 

 Maxillary bone of nearly uniform width. Caudal fin truncate. Gen- 

 eral coloration of 8. spilurus, the black spots most numerous posteri- 

 orly. Head 4^; depth 4^. D. 12; A. 10; scales 42 above lateral line, 

 which probably contains about 200 scales. L. 24 inches. Kansas River 

 to Upper Missouri. {Cope.) Like >S'. spUurus in its large mouth and 

 very small scales, but difieriug in the presence of hyoid teeth and in the 

 broad, flat head. We have seen only the head of an old male of this 

 form, but think it will prove to be a variety of 8. purpuratus. 



(Salmo stomias Cope, Haydeu's Gool. Snrv. Wyom. 1870,433, 1872: Salmo stomias Jor- 

 dan, Hayden's Geol. Surv. Terr. 1878, 795.) 



Var. lAcnsSiawi Gill & Jordan. — Lake Tahue Trout; Silver Trout; Black Trout. 



Body elongate, not greatly comi)ressed. Head comparatively slender 

 and long-acuminate, its ui^per surface very slightly carinated ; muzzle 

 somewhat pointed, but bluntish at the tip; head not convex above; 

 maxillary rather short, about as in purpuratus^ not reaching much be- 

 yond the eye. Vomerine teeth as usual; a small, rather narrow, but 

 usually distinct patch on the hyoid bone. Dorsal fin small ; caudal fin 

 short, rather strongly forked. Scales medium. Coloration dark, the 

 sides silver3^ ; back about equally spotted before and behind ; sides with 

 rather distant spots; belly generally spotted; head spotted even to the 

 snout ; dorsal and caudal also spotted. Head 3f ; depth 4. D. 11 ; A. 

 12; scales 27-1G0-27 to 37-184-37; coeca 50-GO. L. 18 inches or more, 

 usually weighing 5 or G pounds, but occasionally 25-30. Lake Tahoe, 

 Pyramid Lake, and streams of the Sierra Nevada. Evidently a variety 

 of Salmo piirpuratus, but with a longer and more conical head. A fine 

 trout, noNV common in the San Francisco markets. 



(Salmo henaliawi Gill & Jordan, Man. Vert. ed. 2, 358: Salmo henshaivi and Salmo 

 isuppUcli Jordan & Hensliaw, Rept. Chief Eug., 1878, App. NN, 196, 197, plate: Salmo 

 TieHs/tfliti Jordan, Proc. U. Nat. Mus. i, 7.5, 1878.) 



151.— SALVEHl^US Richardson. 



Charrs. 



"" ( i>aione DeKay; f7m&?a Rapp.) 

 (Nilsson; Richardson, Fanna Bor.-Amer. iii, 170, 1835: type Salmo salvdlnus L.) 



Body moderately elongate. Mouth large or small. Teeth of jaws, 

 palatines, and tongue essentially as in ISalmo, the hyoid patch i)resent 



