OUR FACE FROM FISH TO MAN 



must be regarded from a scientific viewpoint as 

 derived by a few easily understandable modifica- 

 tions, from the type exemplified in the young of 

 recent anthropoids (Fig. 76). 



Against all this mass of evidence for man's 

 evolution from a primitive anthropoid stock the 

 modern schoolmen can only quibble that the 

 corresponding parts of man and ape are "equi- 

 vocable" but not "homologous." 



CONCLUSIONS 



Perhaps the most important and basic conclusion 



concerning the early history of the mouth and jaws 



in the remote ancestors and predecessors of man is, 



first, that however the mouth and jaws may have 



arisen in the first place, their subsequent history, 



from the grade of organization represented by the 



shark, may be traced through to man in its broad 



outlines with the greatest security; secondly, that 



whatever may have been the food habits of the 



invertebrate ancestors of the vertebrates, it is 



extremely probable that from the shark grade 



onward to the early mammalian ancestors of man, 



the mouth and jaws were adapted for the capture 



and disposal of sizable living prey and not for 



152 



