PEIMATES PKOM MADAGASCAE. 



127 



merely as secondarily acquired through the adoption of a similar mode of life. This 

 assumption, of course, implies that the arm-bones of the ancestors of Mecjolada'pis had 

 characteristic " Lemuroid " features which have since been lost. That such may have 



Text-fig. 30. 



Humeri of Megaladapis. X i. 



been the case is indeed possible, but seems an unnecessary assumption. To take one 

 instance : the characteristic curvature of the humerus of the true Lemurs appears to 

 me much more likely to be secondarily acquired, depending on the peculiar use of rhe 



