456 THE AXATOMT OF VEETEBEATED ANIMALS. 



a. Tlie Fnigivora live, as tlieir name implies, exclusively 

 upon fruits. With the single exception of Hypoderma, all 

 the genera embraced in this group have a nail on the second 

 digit of the manus, and the crowns of the molar teeth, 

 which soon wear down, are, when entire, divided by a 

 longitudinal furrow. 



2*2 



The incisors do not exceed — . 



The pyloric portion of the stomach is immensely elon- 

 gated. 



The nose has no foliaceous appendages, and the well- 

 developed pinna of the ear has the ordinary form, neither 

 the tragus, nor any other part, being unusually developed. 



These Bats are confined to the hotter parts of the Old 

 World and of Australia, where, from their dog-like heads 

 and reddish colour, they are known as "Plying Foxes" 

 {Pteropus, Sarpyia, &c.) 



h. The division of the Insectivora contains Bats which, for 

 the most part, live upon insects, though some delight in 

 fruits, and others suck the blood of larger animals. 



The second digit of the manus is devoid of a nail, and 

 sometimes is without any bony phalanges. 



The stomach is usually pyrif orm, with a moderate cardiac 

 enlargement. The molar teeth almost always have such a 

 pattern as is observed in the typical Insectivora, and do not 

 exceed six, or fall below four-, on each side above and below. 



.2*2 2 • 2 



The incisors are ordinarily — - or -— but their niimber 



may be much reduced. 



The integument of the nose is developed into an appen- 

 dage which is sometimes very large and leaf -like, and the 

 tragus of the large ears is often similarly modified. The 

 tail is often long, and sometimes prehensile. 



The genera Desmodiis and Diphylla (of which the group 

 Hwmatophilina has been formed) are the most comjpletely 

 blood-sucking of all the Bats in their habits. They have a 

 pair of enormous, sharp-pointed, upper incisors, while 

 the four lower incisors are small and pectinated. The 



