316 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
Var. stoniius (Cope) J. & G. 
I>o(ly short 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 45 in head. 
Maxillary bone of nearly uniform width. Caudal flu truncate. Gen- 
eral coloration of S. spiluriis, the black si)ots most numerous posteri- 
orly. Head 4.^ ; depth 4|. 1). 12; A. 10; scales 42 above lateral line, 
which probably contains about 200 scales. L. 24 inches. Kansas liiver 
to Upper ^Missouri. [Cope.) Like S. spiiuriis in its large mouth and 
very small scales, but differing in the presence of hyoid teeth and in the 
broad, flat head. AVe have seen only the head of an old male of this 
form, but think it will prove to be a variety of S. piirpin-atus. 
(Salmo stomias Cope, Hayden’s Gcol. Snrv. Wyom. 1870,4^3, 187*2: SaJmo stomias Jor- 
dan, Hayden’s Geol. Snrv. Terr. 1878, 795.) 
Var. Gill & Jordan. — Lake Tahoe Trout; Silver Trout; Black Trout. 
Dody elongate, not greatly compressed. Head comparatively slender 
and long-acuminate, its upper surface very slightly’ carinated ; muzzle 
somewhat pointed, but bluntish at the tip; head not convex above; 
maxillary rather short, about as iu jiui'XBtratuSj 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 silvery ; back about equally spotted before and behin<l ; sides with 
rather distant spots; belly generally spotted; head spotted even to the 
snout ; dorsal and caudal also spotted. Head 3^ ; depth 4. D. 11 ; A. 
12; scales 27-100-27 to 37-184-37; coeca 50-00. L. 18 inches or more, 
usually weighing 5 or 0 pounds, but occasional!}’ 25-30. Lake Tahoe, 
Pyramid Lake, and streams of the Sierra Kevada. Evidently a varietv 
of Salmo purpumtuSj but with a longer and more conical head. A fine 
trout, now common in the San Francisco markets. 
{Salmo henshawi Gill & Jordan, Man. Vert. ed. 2, 358: Salmo henshaivi and Salmo 
ieujipitcli Jordan & Hensbaw, Rept. Chief Eng., 1878, Apii. NN, 196, 197, plate: Salmo 
henshaivi Jordan, Proe. U. Nat. Mus. i, 7.5, 1878.) 
151 .— S A L V E L. B A US Richardson. 
Charrs. 
( Baione DeKay ; Unibla Rapp. ) 
(Nilsson; Richardson, Fanna Bor.-Amer. iii, 170, 1833: type Salmo salvelinus L.) 
liody moderately elongate. IMouth large or small. Teeth of jaws, 
palatines, and tongue essentially as in ISdhno, the hyoid patch present 
