iO AMERICA^ FISHES. 



ADDOMINAL 

 MALACOPTEKYGII. SALMON! I)j:. 



CLARKE'S SALMON. 



Salmo Clarkii ; Richardson. 



" Dr. Gairdner does not mention the Indian name of this Trout, 

 which was caught in the Katpootl, a small tributary of the Columbia, 

 on its right bank. I have therefore named it as a tribute to the me- 

 mory of Captain Clarke, who notices it in the narrative prepared by 

 him of the proceedings of the Expedition to the Pacific, of which he 

 and Captain Lewis had a joint command, as a dark variety of Salmon 

 Trout. In color this species resembles the Mykiss of Kamtschatka, 

 and there is no very material discrepancy in the number of rays in the 

 fins. Vide Arct. Zool., Intr., p. cxxvi. 



" ' Color. — Back generally brownish purple red, passing on the sides 

 into ash gray, and into reddish white on the belly. Large patches of 

 dark purplish red on the back. Dorsals and base of the caudal ash 

 gray, end of caudal pansy purple. Back, dorsal, and caudal studded 

 with small semilunar spots. A large patch of arterial red on the oper- 

 cule and margin of the prcopcrcule. Pectorals, ventrals, and anal 

 grayish white, tinged with rose red. Teeth. — Both jaws armed with 

 strong hooked teeth, a single row on each palate bone, a double row 

 on the anterior half of the vomer and on the tongue. . Dorsal profile 

 nearly straight. Ventrals opposite to the middle of the first dorsal. 

 Fissure of mouth oblique. Extremity of caudal nearly even. Fins. 

 Br. 11 ; P. 12 ; V. 8 ; A. 13 ; D. 11—0.' 



" There appear to have been two specimens of this species sent to 

 me by Dr. Gairdner. In both the spinal column contains sixty-two 

 vertebrae. The teeth, which are closely set, rather long, slender and 

 acute ; and, in the older specimen, considerably curved, are in num- 

 ber as follows : — Intermax. lost ; labials 28 — 30 ; palate bones 15 — 

 17 ; vomer 13, two in front and the others in a single flexuose series, 

 as long as the dental surface of the palate-bones ; lower jaw 13 — 13 ; 

 tongue 6—6, in two almost parallel rows The lingual teeth are the 



