312 Notices of Certain Siyecies of 



metrical. Back less arched ; and -with little tendency to 

 "humping." Teeth develo})ed as in the female S. Scouleri. 



Habitat. — Anadromons, ascending the Columbia in antnmn. 

 Found extensively abundant in the Okanakani River, where it 

 is known to the whites as the " Little Red-Salmon," and to the 

 natives as the Ta-ah-nia. 



Earned after Dr. James G. Cooper, who has done so much 

 towards elucidating the Natural History of the ISTorth West 

 Coast. 



Notes on Species of Salmon heretofm^e described. 



The Sahno canis Suckley imperfectly described in the 

 Annals N". Y. Lyceum, Dec. 1858, from memory, has the fol- 

 lowing additional characteristics not then given, which appear 

 on the examination of specimens recently added to the Smith- 

 sonian Collection. A broad dilated knob on the extremity of 

 the lower jaw uj)on which there are usually at least three large 

 curved teeth on each side — the anterior being the larger. 

 Large curved teeth on the premaxillaries : arms of the lower 

 jaw studded with teeth of nearly uniform size and appearance. 

 Tongue with a diverging row of four teeth on eacli side. Skin 

 unspotted with speckles, but wlien the fish has been a few days 

 in fiesh water, blotched with large patches of dingy green and 

 purplish red. Caudal somewhat forked, unspotted. Other 

 fins unspotted. The niouth of the female is, as usual with this 

 group of the salmon, more synimetrical than that of the male. 

 Skin thick and . fleshy ; fin membranes, ditto. Scales quite 

 adherent, overlapping each other about one third. The head 

 is large, its dorsal outline nearly straight from the snout to 

 nape. It is contained about four and a half times in the total 

 length of the fish. . 



I have proposed a distinct sub-genus for the group of salmon 

 embracing this species, the S. Scouleri, S. proteus, and S. 

 Cooperi^ in which the adult males have the premaxillaries con- 



