SKELETON OF THE BAT. 



199 



7 lumbar, 3 



iminmis) (Y'lg. 4:2\ is: 7 cervical, 12 dorsal 

 sacral, and 8 caudal vertebras. The chief characteristics 

 of the skeleton are : the gradual diminution of size of the 

 spinal column from the cervical to the sacral regions ; the 

 absence of neural spines in the vertebrce beyond the den- 

 tata; a keeled sternum; long and strong, bent clavicles, 



Fin;. 42. 



SKELETON or THH TiXT {Vc<i2:>f'rtih'o uiKrinus). 



58; broad scapulae, 51; elongated humeri, 53; more 

 elongated and slender radius, 55; and still longer and 

 more slender metacarpals and phalanges of the four fin- 

 gers, zV, iii, iv, V, which are without claws, the thumb, z, 

 being short, and provided with a claw; the pelvis, 62, is 

 small, slender, and open at the pubis, 63 ; the fibula, 67, 

 is rudimental, like the ulna, 5-1, in the fore-arm. The 

 common bat has a long and slender stilliform appendage 



