THE FAILURES OF ARBOREAL LIFE 217 



Flying Phalanges (Petaurus, Acrobates, etc) and tlic- 

 rodent Flying Squirrels {Pteromys, Anomalurus, oU- ) 

 which have made some progress towards flight 15ut it 



Fig. 80. — Young Female Galeopithecm. 

 From a specimen collected by Charles Hose. 



is to be doubted if the truly flying ^Mammals, sucli as the 

 Bats, started their career on these lines. 



According to Willey, " the facts seem to show rloarly 

 that it is not merely the habit of taking flying leaps, h'ko 



