2 Descriptions of Several New Species of Salmonidce, 



dotted with roundish black spots, the scales in certain lights showing 

 bright silvery reflections ; sides below the lateral line are usually uni- 

 color, of a yellowish white ; inferior fins unspotted ; tail and upper fins 

 yellowish olive, profusely spotted with round and oval spots of black, 

 each spot being from one to two lines in diameter, and completely 

 isolated from the others, not confluent as in some other species ; caudal 

 fin moderately lunated, not forked ; head small ; teeth small, and very 

 numerous, especially on the labials ; length of the full grown adult 

 rarely exceeds 2 feet. 



Habitat. — ^The Columbia River and its larger affluents. The 

 species is apparently not anadroraous, but seems to remain in 

 the fresh waters throughout the year. 



The typical specimen upon which the foregoing description 

 is based, is a single skin contained in the Smithsonian collec- 

 tion, Cat. Number 940 — that of a female obtained by the present 

 describer, at Fort Dalles, Oregon, April 5th, 1855. The species 

 is known to the Walla Walla Indians as the Shoo-shines, and to 

 the WasGOS by the name of Ic-Jcwan-eeh 



Mr. Girard, mistaking the specimen for the S. tsuppitch of 

 Richardson, figured and described it as belonging to that 

 species. Upon his attention being called to several marked 

 discrepancies between the account given by Sir John Richard- 

 son of the S. tsiippitch, and certain characteristics of the 

 specimen from Fort Dalles, he at once coincided with me in 

 considering the two species distinct. According to Richardson 

 the S. tsuppitch has the dorsal, anal, and caudal fins destitute 

 of spots, and the toM forked. The present fish, on the contrary, 

 has the tail but moderately lunated at its extremity ; and the 

 dorsal fins and tail are profusely spotted with Mack. These 

 prominent differences, besides many others less striking, have 

 been deemed sufficient to settle the question of non-identity of 

 the two species ; and as no recorded description seems to refer 

 to the present salmon, it is now presented as a new species 

 under the name Salmo Gihhsii, in honor of my valued friend 

 George Gibbs, Esq., Geologist to the N. W. Boundary Commis- 



