The Identification of Salmon and Trout. 153 



alternately to the right and left, which soon 

 disappear, except three or four on the front 

 of the vomer. It has 14 to 15 scales in an 

 oblique line forward, from behind the adipose 

 fin to the lateral line. There are 24 to 30 

 rows of scales above, and about 22 below the 

 lateral line. 



Of the Salmo fario, or river trout, there are 

 two varieties in Britain (besides the various 

 lake trouts, such as the Loch Leven trout — 

 S. Levenensis — which is celebrated for its fine 

 flavour ; 8. ferox, or large lake trout ; and 

 several other species). Of these two varieties 

 of the Salmo fario, one, the Salmo fario 

 ausonii of G-tinther, sometimes attains to a 

 length of over 30 inches, and weighs over 

 20 lbs. It is found in the southern parts 

 of England, in Sweden, and on the conti- 

 nent of Europe. It has 13 to 14 rays in 

 its dorsal fin, 10 to 11 in the anal, and 13 in 

 the pectoral; it has 57 to 58 vertebrae, and 

 38 to 47 pyloric casca. Its dentition is the 

 most perfect of any of the genus. The body 

 of the vomer has a double row of strong teeth, 

 either opposite or alternate, which do not 

 become lost, as in the migratory salmonoids, 



