796 



BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Hyoicl boue with a band of rather strong teeth. This character will at once separate 

 it from S. ;pleuriticus, which has similarly small scales, as that species never has hyoid 

 teeth ; the relations of this fish are therefore as much with S. darJd and S. lienshawi, 

 as with sjnlurus and i)leuriticu8. From both S. lienshawi and S. clarki it differs in 

 the form of the head and small size of the scales ; from S. lienshawi notably in the form 

 of the caudal fin. The following are the measurements of the head : — 



Snout in head 3i; eye in head 6f ; interorbital space in head 3|-; maxillary in head 

 2J; mandible in head H 5 length of head in inches 5-^. The snout and bones of jaws 

 are doubtlessly shorter in the female. 



16. — Salmo clarki Eich. 

 Yar. aurora (Grd.) G-ill & Jordan. 



Missouri Eiver Trout. Utah Trout. 

 Var. clarM. 



1636 — Salmo clarldi Eichardson, Fauna Bor.-Amer. iii, 225. 



Salmo clarkii Stoker, Synopsis Fishes N. Am. 197, 1846. 



Salmo clarldi Hei;beet, Frank Forrester's Fish and Fishing, Suppl. 40, 1850. 



Salmo clarldi Suckley, Nat. Hist. Wash. Terr. 344, 1860. 



Salmo clarldi Suckley, Monograph Genus Salmo, 112, 1874. 



Salmo clarldi Jordan, Man. Vert. ed. 2d, 359, 1878. 



Salar clarldi Jordan, Bull. U. S Geol. Surv. Terr. 430, 1878. 

 1856— i^tirio stellatus Grd., Proc. Ac. Nat. Sc. Phila. 219. 



Fario stellatus Gikard, U. S. Pac. R. E. Exp, Fish, 316, pi. 69, f. 5-8. 



Fario stellatus Suckley, Nat. Hist. Wash. Terr. 346, 1860. 

 1861 — Salmo hrerAcauda Suckley, Ann. N. Y. Lye. Nat. Hist, vii, 308. 



Salmo hrericauda Guinther, Cat. Fishes Brit. Mu,--. vi, 120, 1867. 



Salmo brevicauda Suckley, Monograph Gen. Salmo, 140, 1874. 



Var. aurora. 



1856 — Fario aurora Grd., Proc. Ac. Nat. Sc. Phila. 218. (Based on two young speci- 

 mens.) 



Fario aurora Grd., Pac. R. E. Eep. x, 308, 1858. 



Salmo aurora Suckley, Nat. Hist. Wash. Terr. 343, pL 68, 1860. 



Salmo aurora Gunther, Cat. Fishes Brit. Mus. vi, 119, 1867. 



Salmo clarldi var. aurora Jordan, Man. Vert. ed. 2d, v59, 1878. 



Salar clarldi var. aurora Jordan, Bull. U. S. Geol. Surv. Terr, iv, 430, 1878. 

 1856— -SaZar leivisi Girard, Proc. Ac. Nat. Sc. Phila. 219. 



Salar lewisi Gtrard, U. S. Pac. E. E. Expl. Fish, 318, pi. 72, 1858. 



Salmo Imvisi Suckley, Nat. Hist. Wash. Terr. 348, 1860. 



Salmo lewisi Gxjnther, Cat. Fishes Brit. Mup. vi, 122, 1867. 



Salmo lewisi Suckley, Monograph Genus Salmo, 139, 1874. 

 18o6— Salar virginalis Girard, Proc. Ac. Nat. Sc. Phila. 220. 



Salar virginalis Girard, Pac. E. E. Expl. Fish, 320, pi. 73, f. 1-4, 1858, 



Salmo virginalis Suckley, Nat. Hist. Wash, Terr, p, — , 1860, 



Salmo virginalis GtJNTHER, Cat. Fishes Brit. Mus, vi, 123, 1867, 



Salmo virginalis Suckley, Monograph Gen. Salmo, 135, 1674. 



