MILLER: MAMMALS OF ONTARIO. 
9 
Erethizon dorsatus (Linn.). 
The porcupine is common at North Bay, Peninsula Harbor, and' 
Nepigon. I secured no specimens, but saw a mounted skin at North 
Bay. 
Mr. Brooks reports the animal not common at Mount Forest and 
very rare at Milton. 
Not mentioned by Gapper. 
The porcupine probably occurs throughout the heavily wooded 
parts of the Canadian and Hudsonian zones in Ontario and in the 
cooler parts of the Transition zone where the forests are sufficiently 
extensive to meet its needs. 
Zapus Hudsonius (Zimmerniann). 
The jumping mouse is common at North Bay and Nepigon, but 
I could not find it at Peninsula Harbor. My failure to secure it at 
Peninsula Harbor was probably due to the late date at which I col¬ 
lected there. 
Mr. Brooks found the jumping mouse common at both Mount 
Forest and Milton. 
It is also recorded by Gapper from the region between York and 
Lake Simcoe. 
Measurements of Zapus iludsonius from Ontario. 
Locality. 
Number. 
Sex. 
Total 
length. 
Tail 
vertebrae. 
Hind foot. 
Ear from 
meatus. 
North Bay, Ontario. 
4244 
$ 
208 
124 
29 
13 
44 <4 44 
4245 
8 
158 
120 
30 
13.4 
44 44 44 
4246 
8 
190 
117 
29.6 
13 
44 44 44 
4247 
8 
193 
120 
30 
13.4 
44 44 44 
4258 
8 
190 
107 
29 
14.6 
Nepigon, “ 
4251 
? 
200 
122 
29.6 
14 
44 4 4 
5254 
? 
213 
131 
30.4 
15.4 
4 4 44 
5255 
? 
200 
120 
30 
13 
4 4 4 4 
5257 
? 
200 
120 
29 
14 
4 4 44 
5252 
8 
212 
lOQ 
loo 
31 
14 
44 44 
5253 
8 
205 
126 
31 
14.8 
44 44 
5256 
8 
200 
120 
29 
14 
