THE FAILURES OF ARBOREAL LIFE 217 



Flying Phalanges (Petaurus, Acrobates, etc.) and the 

 rodent Flying Squirrels (Pteromys, Anomalurus, etc.) 

 which have made some progress towards flight. But it 



FIG. 80. YOUNG FEMALE Galeopithecus. 

 From a specimen collected by Charles Hose. 



is to be doubted if the truly flying Mammals, such as the 

 Bats, started their career on these lines. 



According to Willey, " the facts seem to show clearly 

 that it is not merely the habit of taking flying leaps, like 



