176 



PISCES. 



Family II. Salmonid^. 



Body graceful, clotlied witli scales ; two dorsals ; 

 the first formed of soft rays ; the second minute, 

 without rays, formed of skin enclosing fatty sub- 

 stance {adipose). 



Bcopelus (Cuv.). Argentine. Body long, slender ; 

 second dorsal almost obliterated ; mouth wide. 



S. Humboldtii. Fig. 271 ; n. s. 



271 



"o O o O O O 



°/° o o o o Q o o o n"^ 



272 



Osmerus (Cuv.). Smelt. Characters those of 

 Salmo, but the body is more slender ; there are 

 two rows of teeth on each palate-bone, but only a 

 few at the very front of the vomer. 



O. eperlanus. Fig. 272 ; ^n.s. 

 Hebridicus. 



