GENERA AND SPECIES. 1 2Q 



Salmo. Plates xxv. and xx vi. SALMONID^E. 



Teeth on body of vomer in a single series throughout 



195. salar, SALMON. Spots black, few and small. Lateral line 



120 to 125. 



200. levenensis, LOCH LEVEN TROUT. Spots black, many and large 



on head. Lateral line 120 to 130. 



202. orcadcnsis, GREY TROUT. Spots black and red and small. 



Lateral line 115. 



Teeth on body of vomer in one series dividing into two 



196. trutta, SEA TROUT. Sides silvery. 



198. eriox, BULL TROUT. Sides brownish. 

 Teeth on body of vomer in a double series throughout 



197. albus, BLUE POLL. Head short, body long, pectorals 



pointed. 



203. Jerox, LAKE TROUT. Head long, snout long, caudal 



truncated. 



205. nigripinnis, HOG-BACKED TROUT. . Fins dark, pectorals long 



and black. 



204. stomachichus, GILLAROO TROUT. Pectorals 13 ; dorsals 15 ; fins 



edged with white. 



199. cambricus, SEWEN. Pectorals 13 or 14; dorsals 12 to 14; dor- 



sal longer than high. 



201. fario, TROUT. Pectorals 13 to 15; dorsals 13 to 15 ; dorsal 



higher than long. 



Teeth at head of vomer only ; teeth small ; lower jaw feeble 

 211. colii COLE'S CHAR. Pectorals not reaching dorsal. 



209. killinensis, KILLIN CHAR. Pectorals reaching or overlapping 



dorsal ; colour, dark, with light spots. 



210. grayi, GRAY'S CHAR. Pectorals reaching or overlapping 



dorsal ; colour, light, with orange spots. 



Teeth at head of vomer only ; teeth moderate ; jaws equal in strength 



206. alpinus, ALPINE CHAR. Height of body a fifth or sixth of 



total length ; height of dorsal three-eighths or half 

 the length of the head. 



207. perisii, TORGOCH. Height of body a fifth or sixth of total 



length ; height of dorsal two-thirds the length of 

 the head. 



208. willughbii, WINDERMERE CHAR. Height of body a quarter of 



total length ; dorsal as long as the head without the 

 snout. 



The Salmon, like all the genus, has an adipose dorsal fin, which 

 we need not again mention. The dorsal has 13 or 14 rays, the anal 

 n, the caudal 19, the pectorals have 13 or 14 rays, and the ventrals 

 9. The dorsal is rather shorter than it is high ; the ventrals are 

 beneath the middle of the dorsal ; the caudal is much forked in the 

 young, and almost square in the adult. The abdomen is more 

 curved than the back ; the mouth extends to the middle of the eye, 



