NORTHERN ZOOLOGY. 
PART I. 
MAMMALIA. 
[1.] 1. Vespertitio Prurosvs. (Say.) Hoary Bat. 
Genus. Vespertilio. Linn. Sub-genus. Vespertilio, GEorFRoy. 
VY. Pruinosus. Say. Long’s Exped., vol. i. p. 167. American edition. (vol.i. p. 331, Engl. ed.) 
Harzian. Fauna Amer. p. 21. 
Hoary Bat. Gopman. Wat. Hist. vol.i. p. 68, and fig. t. No. 3. 
This species of Bat was first noticed by Mr. Nuttall, at Council Bluffs, on the 
Missouri; and Mr. Say, in Long’s Expedition, describes an individual captured 
in the same neighbourhood. Dr. Godman states, that it has been taken near 
Philadelphia. The specimen I have described below was caught at Cumberland- 
house on the Saskatchewan, in latitude 54°, and presented to me by Mr. Isbister, 
resident clerk at that post. This individual is larger than Mr. Say’s, but there 
seems to be no other difference. Godman’s figure does not represent the tail 
forming a small obtuse point to the interfemoral membrane, such as it exists in 
my specimen. After a minute examination, I could find no traces of more than 
two incisors in the upper jaw. Mr. Say found the same number; but it is pos- 
sible, that some cutting-teeth may have dropped out in both specimens. The 
number of teeth would bring this species of Bat into the genus Nycticezus of 
Rafinesque ; but the whole habit of the animal shews that it is properly classed 
in Geoffroy’s genus Vesperttlio, a subdivision of the great Linnean genus. 
DESCRIPTION. 
Dental formula, incisors 2, canines j=}, grinders = = 34, 
The superior incisors are conical and sharp pointed, separated from each other by a wide 
naked space, and closely adjoining to the canine tooth on their respective sides. They are 
: B 
