Jordan and Everrnann. — Fishes of North America. 493 



Salmo hrevicauda, Sucki.et, Ann. Lye. Nat. Hist. N. Y., vii, 1861, 308, Puget Sound. (Coll. 



Kenncrly, Cooper, and Suckley.) 

 Sidmo slellalus, GIinther, Cat., vi, 117, 1866. 

 Sahiio aitrorii, GuNTHER, Cat., VI, 119, 1806. 

 Sahiio hrencduda, GuNTilER, Cat., VI, 120, 1866. 



Represeuted in the head waters of Snake River, Yellowstone River, and 

 Missouri River by 



779b. SALMO MYKISS LEWISl (Girard). 

 (Yellowstone Trout; Cut-throat Trout.) 

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

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

 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 (Diboth- 

 rium cordicejis^ yheidj). (Named for Captain Meriwether Lewis, (1774-1809), 

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

 Salar h'lrwi, GiR.iBD, Proc. Ac. Nat. Sci. Phila., 1850, 2Ui, Falls of Missouri River. (Coll. 



Lewis & Clark.) 

 Salmo carinntiis, Cope, Hayden's Geol. Surv. Mout., 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 MTKISS 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 prevailiug form in the region between that occupied by clarkii 

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

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

 mission.) 



Fario tsuppUrh, GiRARD, Proc. Ac. Nat. Sci. Phila., viii, I8,j6, 21S, Fort Dallas, Oregon; not 



of Richardson. 

 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, 1801 (1874). 



Represented in western Nevada and neighboring parts of California by 



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

 (Lake Tahoe Trout ; Truckee Trout ; Silver Tr<iiit.) 

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

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



*Forafun 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. 

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



