46. SALMONIDiE SALVELINUS. 317 



or not. Vomer hoat-shaped, the sLaffc much 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 younj;-, truncate in some species, in the adult. Sexual peculiari- 

 ties not stronglj' marked, the males with the premaxillaries enlarged 

 and a fleshy i)rojectioii 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 

 become nearly plain and silvery. The members of this genus are in 

 general the smallest and handsomest of the trout. {Salvelinus, an old 

 name of the charr; allied to the German Siilbling, a little salmon.) 



* Vomer with a raised crest behind the clievron, free from the shaft; the crest armed 

 with teeth; hyoid teeth strong; lake trout, gray-si)otted {Cristivomcr* Gill & 

 Jordan). 



509. S. namaycush (Walb.) Goode.— ifacti/mzo TroH^/ Great Lake Trout ; Longe 

 {Vermont); Toque {Maine). 



Body elongate, covered with thin skin, there being no special devel- 

 opment of fatty tissue. Head very long, its upper surface flattened. 

 jMouth very large, the maxillary extending much beyond the eye, the 

 head and jaws proportionately 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, 4J in head. Maxillary nearly half the length of the head; 

 interorbital space nearly |. 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. 



{SaJmo namajjcusliW :i\h. Artedi, Tisc, 1792,68: SdlmonamaymshQ:n\\i\\eT,Y\, 123, and 

 of anthors generally: Salmo amethjislhius Mitchill, Jonrn. Acad. Nat. Sci. Phila. 1818 

 410: Salmo conjlnis UeKay, N. Y. Fauna, Fish. 1842, 238: Salmo adarondacun Norris: 

 Salmo toma Hamlin: Crintivomer namaycush Jordan, Man. Vert., ed. 2d, 359: Salmo 

 mcowet Giinther vi, 123.) 



•Jordan, Man. Vert. ed. 2, 1878, 356 : type Salmo namaycush Walbaum. {Cr'mta, crest ; 

 vomer, vomer.) 



