Distribution of the Salmonide. 313 
Europe, S. alpinus. All of our species except fontinalis—the com- 
mon brook trout—belong to the group having hyoid teeth. The 
largest species on both sides of our continent extend far to the north- 
ward: malma to the Colville River, in Alaska; stagnalis and rossi 
to Boothia Felix and Greenland. As a rule, all of our red-spotted 
charr with hyoid teeth have the dorsal and caudal fins without bands, 
while in the common brook trout—which is usually without hyoid 
teeth—these fins are always banded and mottled. The small charr 
of Monadnock Lake, in New Hampshire, S. agassizi, belongs to the 
group with hyoid teeth and forked tail. It has the dorsal and caudal 
banded, but the body has no mottlings, such as are found in 
fontinalis. 
The character of the absence of hyoids in fontinalis is not to be 
absolutely depended upon in classification. About ten per cent. of 
the seventy-three examples obtained by Mr. L. M. Turner in Labra- 
dor have hyoids feebly developed, there being in no case more than 
three of these teeth present. From Castleton, New York, we have 
a specimen with hyoids ; and in a brook trout from Woods Holl, 
Massachusetts, three hyoid teeth exist. It would seem that these, 
exceptional occurrences of hyoids are most pronounced and frequent 
in the northern portion of the habitat of fontinalis, the range of which 
Species is now known to extend from Labrador to North Carolina, 
and, perhaps, Georgia. 
Brook Trout (Salvelinus fontinalis). New Ea Market. # natural length. — 
The most northerly species of Salvelinus recorded is the arcturus 
S Günther, a species which is said to lack red spots. If the current 
ustrations be correct, this is the least highly-ornamented of the 
