434 



ANIMAL BIOLOGY 



mously thick cranial walls of this Piltdown man, Eoanthropus 

 daivsoni, resemble those of the Peking man, but the forehead and 

 vault of the skull approach nearer to that of modern man. How- 

 ever, the jaw and canine tooth are more ape-like than in the man 

 of Peking, and probably do not belong to the same skeleton. Al- 

 though geologically about contemporaneous, it is difficult from the 

 scanty data to bring the relatively large-brained Piltdown man 

 into relationship with the Java and Peking men. It has been sug- 

 gested that the human line comes from the Piltdown rather than 



Fig. 278. - - Skull and face of Pilt- 

 down Man, Eoanthropus daivsoni. 

 (From Lull, adapted from McGregor.) 



Fig. 279. —Skull and face of Hei- 

 delberg Man, Homo heidelbergensis, 

 based upon McGregor's restoration 

 of the skull, the lower jaw only being 

 known. (From Lull.) 



the Peking line, but their relative significance from the standpoint 

 of the direct human lineage remains to be determined. (Fig. 278.) 



4. The Heidelberg Man 



A species of early Man is represented merely by a lower jaw 

 found during 1907 in a sand deposit of Early Pleistocene age near 

 Heidelberg, Germany. The quite massive jaw is of a primitive 

 type, but the teeth are essentially human both in relative size and 

 general appearance. Accordingly, the Heidelberg man is included 

 in the same genus with modern man, as Homo heidelbergensis. 

 However, the relationships of Heidelberg man are obscure, though 



