THE TERTIARY PERIOD 327 



Lemuroids (e.g. Lemurs) and Primates (e.g. Monkeys, Apes, 

 and Man). These two groups include the highest of all animals. 

 During the Eocene " Numerous Lemuroids and primitive types of 

 Monkeys swarmed in the trees" (W. B. Scott). True Monkeys 

 and Apes, however, did not appear till in the Miocene (Fig. 208). 

 A partial skeleton, known as Pithecanthropus erectus, discovered in 

 Java (1891) in deposits possibly of Pliocene age, has been the cause 

 of much discussion. This creature appears to have had characters 

 intermediate between the lowest types of Men and the highest 

 types of Apes, but the bones have elicited much difference of opin- 

 ion. By some they are regarded as those of an ancestral type of 

 Man; by others as those of an abnormal human being; and by still 

 others as those of a large Ape. 



So far as present knowledge goes, we have no positive evidence 

 that Man appeared on the earth even late in the Tertiary, though 

 future discoveries may trace his ancestry that far back. The 

 antiquity of Man will be further discussed toward the close of the 

 next chapter. 



