Vol. XXI, pp. 33-34 January 23, 1908 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A TROUT FROM LAKE KOOTENAY 

 IN BRITISH COLUMBIA. 



BY DAVID STARR JORDAN AND JOHN OTTERBEIN SNYDER. 



Stanford University. 



The Museum of Stanford University lias lately received, 

 through the courtesy of Mr. John P. Bahcock, Commissioner of 

 Fisheries for British Columbia, a very large trout weighing 22 

 pounds, from Lake Kootenay, a tributary of the Columbia in 

 British Columbia. 



This specimen seems to belong to the species or subspecies 

 described from Lake Kamloops in the same region by Dr. Jordan 

 (Jordan & Evermann, Fishes North and Middle Araer., I, p. 

 489, 1898), from two specimens (44,238, U. S. N. M.) collected 

 by Mr. A. C. Bassett. These specimens were but 16i inches long. 

 They were much more slender than the specimen before us, and 

 there was a rosy band along the side. 



The fish in hand differs in the much greater depth — perhaps 

 due to age, in the longer head — perhaps a character of the 

 male, and in the absence of any rosy shades whatever. 



Nevertheless, it is probably an old individual of the same 

 species, Salmo kamlooys. It is close to the Steelhead Trout, 

 Salmo rivularis Ayres (wrongly called Salmo gairdncri by most 

 recent writers), differing mainly in the robust body, the much 

 larger head and in the much larger number of rows of spots 

 on the dorsal fin. We present a description and figure of the 

 Kootenay specimen. 



Head 3.9 in length, measured to end of last caudal vertebra; depth 

 3.6; depth of caudal peduncle 2.4 in head; diameter orbit 6; width of 

 interorbital space 2.6; snout 3; maxillary, measured from tip of snout, 

 1.6; D. 11 ; A. 11 ; scales in lateral series 148, between base of ventral and 



5— Proc. Bioi.. Soc. Wash., Vol. XXI. 190S, (33) 



