1880.] NATURAL SCIENCES OF PHILADELPHIA. 175 



from other points of view the Orang approaches man more closelj'- 

 than either the Gorilla or Chimpanzee, and that as regards certain 

 muscles, man and the lower monkeys agree in having them, while 

 they are absent in the anthropoids. From these facts we maj-- 

 reasonabl}^ infer that the ancestral form of man Avas intermediate 

 in character as compared with the living anthropoids or lower 

 monkeys, agreeing with them in some respects, and differing from 

 them in others. The Orang is closely allied to the Gribbons, the 

 Chimpanzee to the Macacques, and the gap between these and the 

 Senviopithecus is bridged over by the Mesojnthecus of Graudr^-. 

 Until,' however, the paleontologist will have procured more 

 material like that from Pikermi, and interpreted it as ably, it 

 will seem to me premature to oifer any detailed genealogical tree 

 of the Primates. 



