SALMONOIDEjE. 



225 



series, and a double row on the tongue. Form. — Head small, exactly conical, terminating in 

 a pointed snout. Commissure of mouth very slightly oblique. Convexity of dorsal profile 

 rising gradually to origin of first dorsal, and declining from thence to the tail. Caudal forked. 

 Rays.— Br. 13; P. 13; V. 10; A. 13; D. 12-0. 



"Dimensions. 



Inches. Lines. 



Extreme length 21 



Greatest height of body ... 4 9J 



„ circumference of body 12 



Breadth between the eyes ... 1 9% 



Length from end of snout to eye . .1 7 a 



„ „ angle of opercule 4 8| 



., „ nape 3 



„ „ pectorals . 5 



„ „ dorsal . 11 



„ „ ventrals .12 



,, „ anal . . 16 



Inches. Lines. 



Length from end of snout to adipose 



„ of pectorals 



,, ventrals 



„ attachment of dorsal 



Height of dorsal . . . 



„ adipose . . 



Length of attachment of anal . 

 Height of anal . . . 



Length of caudal . . . 



Greatest breadth of ditto 



18 

 2 

 2 

 2 

 2 

 

 2 

 1 

 3 

 6 



°3 



H 



n 



10§ 

 6 



6 



2" 



Gairdner, in lit. 



[A spine containing sixty-four vertebrae, and an under jaw with ten curved teeth in each limb, 

 are all the bones that I can with any appearance of correctness refer to this species. The 

 teeth are of equal size with those of S. Gairdneri, or perhaps rather larger, and are attached 

 to the jaw-bone through the medium of cartilage. — R.] 



[86.] 15. Salmo Clarkii. (Richardson.) Clarke s Salmon. 



[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 memory 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 (see p. 163). In colour this species resembles the Myhiss of Kamtschatka, 

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

 Arct. Zool., Intr., p. cxxvi. — R.] 



" Colour. — Back generally brownish purple-red, passing on the sides into ash-grey, and 

 into reddish-white on the belly. Large patches of dark purplish-red on the back. Dorsals 

 and base of the caudal ash-grey, end of caudal pansy-purple. Back, dorsal, and caudal 

 studded with small semilunar spots. A large patch of arterial-red on the opercule and mar- 

 gin of the preopercule. Pectorals, ventrals, and anal greyish-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.— tfr. 11 ; P. 12; V. 8 ; A. 13 ; D. 11—0. 



2g 



