32 AMERICAN FISHES. 



below the site of Fort Vancouver, as having occurred on the 18th of 

 April, in the year 1806. 



" ' Color. — General tint of the back bluish gray, changing, after a 

 few hours removal from the water, into mountain green ; sides ash 

 grey with silvery lustre ; belly white ; back above the lateral line stud- 

 ded with irregular rhomboidal or star-like black spots, some of them 

 oocellated. Dorsal fin and gill-covers slightly reddish ; tips of the anal 

 and pectorals blackish gray ; the dorsal and caudal thickly studded 

 with round and rhomboidal spots, back of the head sparingly marked 

 with the same. Whole body below the lateral line, with the under fins, 

 destitute of spots. Lower jaw and tongue blackish gray ; roof of the 

 mouth tinged here and there with the same. Scales large. Teeth 

 disappearing on the medial line of the upper jaw, one row on each 

 palate bone, a few small teeth on the fore part of the vomer, and two 

 rows on the tongue. Form. — The greatest convexity of the back at 

 the origin of the dorsal ; end of the caudal semilunar ; adipose oppo- 

 site to the posterior end of the anal ; dorsal of greater height than 

 length. Fins.— Br. 17 ; P. 16 ; V 10; A. 16; D. 14 — 0; C. 19|.' 



" The specimen of this Salmon, though it is very soft, and has lost 

 its scales, still retains its form, so that I am able to add the following 

 particulars to Dr. Gairdner's description : — General form much like 

 that of a Salmon Trout. The head is exactly one-fourth of the length, 

 from the tip of the snout to the end of the scales on the caudal. The 

 snout is cartilaginous as in S. Salar, and the length of the lower 

 jaw rather exceeds that of the upper surface of the head. The edge 

 of the gill-plate is an arc of a circle as in that species, but the sub- 

 operculum is still more sloped oiF, having much the form of that of 

 Salmo Scoiileri. There are sixteen gill-rays on the right side, and 

 seventeen on the left. The largest teeth are those of the under jaw, 

 of which there are eleven in each limb, placed at regular distances, 

 with some small ones in the intervals attached to the soft parts only. 

 The labial and intermaxillary teeth are similar to these, and but little 

 inferior in size. The lingual teeth, considerably smaller than those in 

 the jaw, are placed in two parallel rows, five in each. The palatine 

 teeth are a little shorter than the lingual ones, and those on the vomer 

 ave the smallest of all, scarcely protruding through the soft parts in 

 the recent specimen ; there are nine of them — two in front, the others 



