Wings of Bats. 



(a) The wing of a Fruit Bat, showing the fingers connected 

 by the membrane of the wing. The thumb, which is erect, 

 is provided with a claw, and is used in climbing and grasping 

 twigs. The index finger, next to the thumb, is also provided 

 with a claw, which is always absent in Insectivorous Bats. 



() Insectivorous Bats possess a thumb with a claw on the end 

 of it, as seen in this illustration. The index or forefinger, 

 however, in these bats is not tipped with a claw. On the 

 contrary, the South African fruit-eating bats all possess the 

 thumb, and a forefinger terminated by a claw. 



(i) Thumb ; (2) index or forefinger ; (3) second finger ; (4) third 

 finger ; (5) fourth finger. 



