84 



STRUCTURE OF THE VERTEBRATES 



develop their own characteristics, making them appear more 

 divergent than they are in reality. 



The Hominidae include among existing animals only the races 

 of man. All existing men are classified as one genus and one 

 species, Homo sapiens. Several genera of fossil men are known, 

 and these connect the present representatives of the genus Homo 

 with the earlier anthropoids. And even among the living repre- 

 sentatives of the higher anthropoids the relationships are so 

 close that there is a tendency on the part of recent investigators 

 to include man and the gorilla in one family. 



Fox 

 <Carnivora) 



Fig. 32. Carnivora. Three types of land living carnivores (Fissipedia) . 



