CHEIROPTERA. 



11 



VESPERTILIONIDJE. 



BAT-TRIBE. 



Fig. 5. 



VESPERTILIO NOCTULA. 



CHEIROPTEEA. BATS. 



IF the fossil remains of the small Mammals which live 

 in trees are rare, still rarer, one might have supposed, 

 would be those of the much smaller species which are 

 organized for flight, and whose bones are necessarily light 

 and fragile. The skill of Cuvier, however, long since ex- 

 posed a considerable portion of the skeleton of a Bat, allied 

 to the Serotine, which was petrified and imbedded in a 

 block of the Eocene gypsum at Montmartre. A few fossil 



