CLASS MAMMALIA 



435 



wings being formed by membranes stretched between the greatly elon- 

 gated digits of the forelimbs and between those and the hind limbs 



■W 



Fig. 329. — Feet of carnivores. A, plantigrade foot (foreleg) of a bear. B, digitigrade 

 foot (foreleg) of a cat. {From Schmeil, " Text-book of Zoology," by the courtesy of A. and 

 C. Black, and of Quelle and Meyer.) 



and tail. They do not use their wings as gliding planes as do other 

 flying mammals but fly with them in somewhat the same manner as 



A B C 



Fig. 330. — The front feet in even-toed ungulates. A, pig. B, deer. C, camel. 

 {From Schmeil, ''Text-book of Zoology," by courtesy of A. and C. Black, and of Quelle and 

 Meyer.) 



do birds, though the flight of the bat is weaker and less direct. Bats 

 are largely insectivorous and nocturnal in habits and are very widely 

 distributed (Fig. 324). 



