FOOT-HANDED AND HAND-WINGED VERTEBRATES. 39 



limbs. It is called the Flying Lemur. It has, however, 

 like the Flying Squirrel, no power to % upward ; but 

 this extension of skin merely enables it to take long 

 sweeping leaps from one tree to another. It is a native 

 of the Moluccas, Philippines, and other islands of the In- 

 dian Archipelago. 



58. In the sub-class of Cheiroptera, or hand-winged 

 Mammals ( 24), we have the only animals of the class 

 Mammalia that can really fly, that is, which can go up- 

 ward in the air. The apparatus for flying is made up of 

 a very delicate skin, without hair, on a frame-work of long 

 slender bones. The bones are essentially the same that . 

 we find in the arm and hand of man, except that most of 

 them are very much longer. This you can see by ob- 

 serving the skeleton of the bat in Fig. 20 in connection 



Fig. 20. Skeleton of the Bat. 



with the skeleton of man in Fig. 1. Beginning at the 

 shoulder, you see first the bone of the arm, then the fore- 

 arm, and from the wrist extend the bones of the four fin- 



