330 Salmonidz 
The color is silvery, sprinkled with small black dots. It reaches 
a size little inferior to that of the salmon, and it is said to be 
an excellent food-fish. In northern Japan is a similar species, 
. 
Fic. 240. —Ito, Hucho blackistoni (Hilgendorf). Hokkaido, Japan 
Hucho blackistoni, locally known as Ito, a large and handsome 
trout with very slender body, reaching a length of 24 feet. It 
is well worthy of introduction into American and European, 
waters. 
Salvelinus, the Charr.—The genus Salvelinus comprises the 
finest of the Salmonide, from the point of view of the angler or 
the artist. In England the species are known as charr or char, 
in contradistinction to the black-spotted species of Salmo, which 
are called trout. The former name has unfortunately been 
lost in America, where the name “trout” is given indiscrimi- 
nately to both groups, and, still worse, to numerous other 
fishes (Mucropterus, Hexagrammos, Cynoscion, Agonostomus) 
wholly unlike the Salmonide in all respects. It is sometimes 
said that ‘‘the American brook-trout is no trout, nothing but 
a charr,” almost as though “charr”’ were a word of reproach. 
Nothing higher, however, can be said of a salmonoid than that 
it is a ‘“‘charr.”” The technical character of the genus Salve- 
linus lies in the form of its vomer. This is deeper than in Salmo; 
and when the flesh is removed the bone is found to be somewhat 
boat-shaped above, and with the shaft depressed and out of the 
line of the head of the vomer. Only the head or chevron is 
armed with teeth, and the shaft is covered by skin. 
In color all the charrs differ from the salmon and trout. 
The body in all is covered with round spots which are paler 
than the ground color, and crimson or gray. The lower fins are 
