478 ‘ZOOLOGY. 
islands of the South Seas. There are two incisors above, elongated, coni- 
cal, and indented; and six below, equal and trifid, with rounded lobes; the 
| projects a little beyond the inter-femoral eae 
The genus Desmodus (curved-tooth bats) inhabits tropical America, where 
three species are known; the character of the genus resides in the Hee 
formation of the teeth. 
In the genus Rhinopoma (lid-nosed bats) the groove on the forehead is 
less distinctly marked than in Nycteris; the nostrils are placed at the end 
of the snout, above which is a little leaf; the ears are united; the tail 
extends far beyond the membrane. One species only is known, principally 
found in the pyramids of Egypt. : 
The genus Yaphozus (wing-pouched bats) is distinguished by a little 
prolongation of the membrane of the wings, which forms a sort of sac near 
the carpus. The head is pyramidal; no recurved leaf is attached to the 
nostrils; there is a small rounded pit on the nose. Nine species of this 
genus are known, some of which belong to the Old, and some to the New 
World. One particular species was discovered in the catacombs of Hgypt. 
The genus Mormoops contains but one species, proper to the tropical 
region of the New World, distinguished in having on each side of the nose 
a triangular leaf, which extends to the ears. There are four incisors in 
each jaw, the superior tolerably large, the inferior trilobate; the cranium is 
raised like a pyramid above the snout. One species only, which inhabits 
tropical America. 
Fam. 2. VESPERTILIONIDZ. The genus Vespertilio (bats proper) has a 
snout deprived of leaf, or any other peculiar appendage; the ears are sepa- 
rated, and independent from each other; the tail is contained in the mem- 
brane between the hind limbs. This genus is the most numerous in species, 
and is found in both the Old and New Worlds. Seven are described from 
North America, from the Atlantic to the Rocky Mountains, known as hoary 
bat (V. pruinosus), little brown bat (V. subulatus), sivey haired bat (V. 
noctivagams,) in the Northern, Middle, and Western States; others are 
found in the Carolinas and ene 
Of Kuropean bats we mention the common bat of Europe, V. murimus 
(pl. 117, fig. 5); V. noctula (pl. 117, fig. 8); and the serotine bat, V. seroti- 
nus (pl. 117, fig. 4). 
The genera Hmballonura (long- nosed bats) and Nycticejus (roquet dog- 
bats) include numbers of species allied to Vespertilio, and peculiar to the 
tropical regions of both the Old and New Worlds. 
The genus Furia (fury bats) is composed of one species from tropical 
America, which differs generically from all others. 
Of the genus Vespertilio proper, several fossil species have been described 
from the tertiary strata of the Old World, one of which is very nearly allied 
to the common bat of the same hemisphere. 
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