46. SALMOXID.^: SALVELI^XS. 
317 
or not. Vomer boat-shaped, the shaft mncb depressed, with or without 
raised crest, with teeth on the chevron and none directly on the shaft. 
Scales v?ry small, in 200-250 rows. Fins moderate, the caudal forked 
in the j'oung, truncate in some species, in the adult. Sexual peculiari- 
ties not strongly marked, the males with the premaxillaries enlarged 
and a fleshy imojection at the tip of the lower jaw. Coloration dark, 
with round crimson or gray spots, and the lower fins sometimes with 
marginal bauds of black, reddish, and pale. Species numerous in the 
clear streams and lakes of the northern parts of both continents, some- 
times descending to the sea, where they lose their variegated colors and 
0 
become nearly plain and silvery. The members of this genus are in 
general the smallest and handsomest of the trout. {Salveliniis, an old 
name of the charr; allied to the German SiilbUng, a little salmon.) 
* Vomer witli a raised crest beliiud the chevron, free from the shaft; the crest armed 
withteelh; hyoid teeth strong; lake trout, gray-spotted (Crishroaicr* Gill & 
Jordan). 
509. S. Biaiiaaycush (Walh.) Goode. — Mackinaw Trout; Great Lake Trout; Longe 
( Vermont ) ; Togue {Maine). 
Body elongate, covered with thin skin, there being no special devel- 
opment of fatty tissue. Head very long, its upper surface flattened. 
Mouth very large, the maxillary extending much beyond the eye, the 
head and jaws proportionatelj’ lengthened and pointed. Teeth very 
strong.’ Caudal fin well forked. Adipose fin small. General colora- 
tion dark gray, sometimes pale, sometimes almost black; everywhere 
with rounded paler spots, which are often reddish tinged ; head usually 
vermiculate above; dorsal and caudal reticulate with darker. Eye 
arge, in head. IMaxillary nearly half the length of the head; 
interorbital space nearly J. Head 4^; depth 4. B. 11-12; D. 11; A. 
11; Lat. 1. 185-205. L. 3G inches. Great Lake region and lakes of 
Northern New York, New Hampshire, and Maine, to Montana and 
northward; very abundant in the larger bodies of water; varying in 
form and color in the different lakes. 
{Sahno namaycusli IValb. Artedi, Pise., 1792, 68 : Salmo vamaycush Giintlier, vi, 123, and 
of authors generally : Salmo amethysfinus Mitchill, Journ. Acad. Nat. Sci. Phila. 1818 
410: Saimo eonjinis DeKay, N. Y. Fauna, Fish. 1842, 238: Sahno adarondacus Norris: 
Salmo toma Hamlin: Cristiromer namayeush Jordan, Man. Vert., ed. 2d, 359: Salmo 
«8coicet Gunther vi, 123.) 
* Jordan, Man. Vert. ed. 2, 1878, 356: type Salmo namaycush'Wa.lhanm. {Crista, crest; 
vomer, vomer. ) 
