496 THE AMERICAN NATURALIST. [VOL. XXXII. 
17. PEROMYSCUS MANICULATUS (Wagner). Labrador deer mouse. 
Hesperomys maniculatus Wagner. Weigmann's Archiv. 
Vol. xi, 1845. 
Type Locality. “ The Moravian settlements in Labrador.” 
Unfortunately, this mouse is at present little known; neither 
Turner nor Goldthwaite took specimens. Low reports it as 
being common at Northwest River, Hudson’s Bay Port. I 
have seen and examined but one example —a fine adult female 
from Great Whale River, in the collection of the Geological 
Survey of Canada. This specimen I have compared with the 
type of Peromyscus texensis arcticus Mearns, and the two 
appear to be identical. 
The Great Whale River specimen of P. maniculatus (meas- 
ured by me from a well-made skin) has the following dimen- 
sions: total length, 166; tail vertebra, 74; pencil, 5; hind foot, 
19.5. The typeof P. texensis arcticus (measured by me from 
well-made skin): total length, 168; tail vertebra, 73; pencil, 5; 
hind foot, 20. In color they agree exactly. The skull of the 
Great Whale River specimen is peculiar. It is very large, 
with an extremely broad, flat brain case and heavy rostrum. The 
molar teeth are also large. The skull of the type of P. texenszs 
arcticus is in the skin, and at present I am unable to examine 
it. The shorter tail and different skull of P. maniculatus distin- 
guish it from any of the members of the canadensis group. 
For the present, until more material from Labrador is avail- 
able, the question of the relationship of P. terensis arcticus and 
P. maniculatus cannot be settled, though it is probable that 
they are the same. One point is perfectly clear — that P. 
maniculatus is a splendid, distinct species. 
18. CASTOR CANADENSIS Kuhl. Canadian beaver. 
Castor canadensis Kuhl. Beiträge zur Zoologie. p.64. 1820. 
Low says the beaver is common in the wooded regions, and 
extends into the semi-barrens where food is found. I have 
seen no Labrador specimens. 
19. ARCTOMYS MONAX MELANOPUS (Kuhl). Hudsonian wood- 
chuck. 
Arctomys melanopus Kuhl. Beiträge. p. 64. 1820. 
