Jordan and Evermann. Fishes of North America. 493 



Salmo breaicauda, SUCKLEY, Ann. Lye. Nat. Hist. N. Y., vn, 1861, 308, Puget Sound. (Coll. 

 Kennerly, Cooper, and Sucklcy.) 



$,,lin<> tt.'llatHS, GC'NTHER, Cat., VI, 117, 1866. 

 Sal,,i<> aurora, GuNTHER, Cat., VI, 119, 18G6. 

 Salntu Irencntula, GUNTHER, Cat., vi, 120, 1866. 



Represented in the headwaters of Snake River, Yellowstone River, and 

 Missouri River by 



779b. SALMO MYKISS LEWISI (Girard). 

 (YELLOWSTONE TROUT; CUT-THROAT THOUT.) 



Similar to var. clarkii in all respects, the body perhaps a little more 

 robust, with the spots encroaching less on the belly. Scales small, 145to 

 170. Red throat mark always present. The Snake River Basin above the 

 Shoshone Falls, and crossing the main divide of the Rocky Mountains at 

 Two-Ocean Pass to the head waters of the Yellowstone, thence to other 

 affluents of the Upper Missouri; common in all suitable waters. Infested 

 in Yellowstone Lake by great numbers of a parasitic worm (Diboih- 

 riMtcordicep8*,Leidy). (Named for Captain Meriwether Lewis, (1774-1809), 

 leader of the noted exploring expedition of Lewis & Clark, in 1803-6.) 

 Solar lewisi, GIRARD, Proc. Ac. Nat. Sci. Phila., 1856, 219, Falls of Missouri River. (Coll. 



Lewis & Clark.) 



Salmo curiiiatHs, COPE, Hayden's Geol. Surv. Mont., 1871 (1872), 471, locality unknown, prob- 

 ably Yellowstone River. 



Represented in tributaries of the Columbia between Shoshone Falls 

 and the Cascade Range by the variable and imperfectly defined 



779c. SALMO MYKISS GIBBSII (Suckley). 



Scales small, usually 142 to 175 series. No red below lower jaw; no 

 hyoid teeth. To this form are provisionally referred the variously inter- 

 mediate examples from the streams of Idaho and Washington, mentioned 

 by Gilbert and Evermann in the paragraph quoted on page 489. Similar 

 specimens have been since taken by Dr. Gilbert in the Des Chutes and 

 other rivers, and by Dr. Evermann in Big Payette Lake, Idaho. It seems 

 to be the prevailing form in the region between that occupied by clarJcii 

 near the coast, and that taken by lewisi above the Shoshoue Falls. 

 (Named for Dr. George Gibbs, geologist of the Northwest Boundary Com- 

 mission.) 

 Fario tsuppitch, GIRARD, Proc. Ac. Nat. Sci. Phila., vm, 1856, 218, Fort Dallas, Oregon; not 



Of RlCHARDSOK. 



Salmo gibbsii, SUCKLEY, Ann. Lye. Nat. Hist. N. Y., 1858, Fort Dallas; (Type, No. 940); also in 

 Yakima River, John Day's River, and Boise River, and at The Dalles; SUCKLEY, 

 Monogr. Salmo, 141, 1861 (1874). 



Represented in western Nevada and neighboring parts of California by 



779d. SALMO MYKISS HENSHAWI (Gill & Jordan). 

 (LAKE TAHOE TROUT ; TRUCKEE TROUT ; SILVER TROUT.) 



Head 3 ; depth 4. D. 11 ; A. 12 ; scales 27-160-27 to 37-184-37 ; usually 

 170 in a longitudinal series; cceca 50-60. Body elongate, not greatly 



* For a full discussion of this parasite and its relation to the trout of Yellowstone Lake see 

 Linton "On Two Species of Larval Dibothria from Yellowstone National Park," in Bull. U. S. 

 Fish Comm., ix, 1889, 65-79, plates 23-27. 



