42 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Mentioned by Gapper in 1830, but not on his own authority. 
The skunks which 1 collected at North Bay and on the north 
shore of Lake Superior have been recorded by Mr. Outram Bangs as 
typical examples of the northern subspecies. 1 Individuals varying 
toward the Mephitis mephitica scrutator probably occur in extreme 
southern Ontario. 
The adult skunks taken at North Bay are all infected by the 
parasite that disfigures the frontal region of the skulls of a large 
proportion of specimens of North American Mustelidae. I sub¬ 
mitted one of the North Bay skulls with the parasites preserved in 
formalin in situ to Dr. W. McM. Woodworth, who identified the 
worms as Filaroides mustelarum , a viviparous nematode hitherto 
recorded from Europe only, where it has been found in various 
species of Putorius and Mustela. 2 
MuSTELA AMERICANA Tlll'ton. 
The marten is common at North Bay, Peninsula Harbor, and 
Nepigon. 
At Nepigon a trapper told me that the martens, wherever they 
occur in sufficient numbers, so terrorize the red squirrels by constant 
persecution that the noisy rodents, learning that silence is their best 
protection, stop chattering. Hence an abundance of silent squirrels 
is — according to my informant at least—a certain indication that 
marten fur is plenty. 
Mustela pennanti Erxl. 
Fisher occur in small numbers at North Bay, Peninsula Harbor, 
and Nepigon. At North Bay I saw a mounted specimen. 
Gapper mentions one taken somewhere between York and Lake 
Simcoe about the year 1830. 
Putorius vison (Schreber). 
The mink is abundant at North Bay, Peninsula Harbor, and 
Nepigon. 
Common at Mount Forest and Milton (Brooks). 
Mentioned by Gapper as occurring in the region between York 
and Lake Simcoe. 
1 Proc. Biolog. Soc. Washington, Dec., 1896, vol. 10, p. 160. 
2 Amer. Nat., March, 1897, vol. 31, p. 234-235. 
