MAMMALIA. 
6l 
Genus 30. — Vespertilio. — Linnceus. 
Generic Character. —Incisory teeth canines J-J, molars 
5 Z 51 g!g» 5-5 or 6 - 6 » fr° m 32 to 36. The upper incisors are 
separated in pairs, cylindrical and pointed, very close, with two 
cutting lobes directed forward; the anterior molars conical, the 
posterior having several sharp points or prominences ; the nose 
simple, without any membranaceous appendage, ridge, or fur¬ 
row ; ears lateral and distinct, internal ears visible; tongue 
smooth, not protractile; index finger with but one phalanx, the 
middle with three, the annular and little finger with two; tail 
not exceeding the interfemoral membrane. Sebaceous glands 
under the skin of the face, assuming different forms and dimen¬ 
sions in the various species. 
Vespertilio murinus. — The Common Bat. 
Plate V. fig. 13. 
Fur reddish-brown above, deeper according to age; grayish 
beneath; face nearly naked; forehead very hairy; nose pro¬ 
minent, projecting beyond the under lip ; nostrils opening later¬ 
ally ; eyes large, ears naked, inclined backwards, separate, with 
the points turning forward; body three and a half inches long; 
expanse of wing fifteen inches. Inhabits Europe, frequenting 
old towers in holes, but never building on trees. 
Genus 31— Plecotus. — Geoffroy. 
Generic Character. —Incisors canines J—J, grinders j-j or 
total 30 or 36. Ears larger than the head, often much deve¬ 
loped ; united together at the base; with four or five superior 
molars, and from four to six inferior on each side. In other 
respects they agree with the Vespertilio. 
Plecotus auritus. — The Long-Eared Bat. 
Plate VIII. fig. 2. 
Ears almost as long as the body; fur gray, deeper above than 
below ; body nearly two inches long ; expanse of wings eleven 
or twelve inches. Inhabits Europe, and is common in Britain. 
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