220 



NORTHERN ZOOLOGY. 



" Colour. — General tint of the back bluish-grey, 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 studded with irregular rhomboidal or star-like black spots, some of them oc- 

 cellated. Dorsal fin and gill-covers slightly reddish : tips of the anal and pectorals blackish- 

 grey : 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-grey ; roof of the mouth tinged here 

 and there with the same. Scales large. Teeth disappearing on the mesial line of the upper 

 jaw, one row on each palate bone, a few small teeth on the forepart of the vomer, and two 

 rows on the tongue. Form. — Greatest convexity of the back at the origin of the dorsal ; end 

 of the caudal semilunar; adipose opposite 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. 19f. 









" Dimensions. 













Inches. 



Lines. 







Inches. 



Lines. 



Extreme length 

 Greatest height 



of body . 



30 



7 





 



Length of pectorals 

 „ ventrals . 





3 

 3 



7 

 



,. circumference of body 



18 







Height of dorsal . 





3 







Circumference of tail at origin of caudal 



6 







Length of ditto 





3 



2* 



Breadth between the eyes . 

 Length from tip of snout to nostrils . 



2 

 1 



6 



Height of adipose . . . 

 „ anal .... 





1 

 2 



4| 

 2* 



» 



J; 

 » 



5> 



eyes . 



angle of preopercule . 



angle of opercule . 



nape 



pectorals 



dorsal . . 



2 

 5 

 6 

 3 

 7 

 13 



31 



24 



6 



7 

 



Length of ditto 



Height of caudal 



Length of its margins . . 



„ centre . . . 

 Distance of pectorals from ridge 

 back .... 



of the 



3 



7 

 5 



1 



4 



4| 



8* 



42' 



)> 



ventral s 



16 















» 



anal 



21 









Gaihdneh, 



in lit. 



)' 



adipose . 



23 















[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 (p. 140, No. 2). 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 suboperculum is still more sloped off, having much the form of that of S. Scouleri 

 (pi. 93). 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 

 are the smallest of all, scarcely protruding through the soft parts in the recent specimen : there 

 are nine of them— two in front, the others in a single series, running upwards of half an inch 



