HUMAN LIFE 



of the other monkeys than they are to 

 those of man. This points to a probable 

 commonness of origin of the now slightly 

 differentiated parasites of men and apes 

 from some parasite ancestor which may 

 have helped make life uncomfortable for 

 certain common ancestors of the anthro- 

 poids and early men. 



The biologist finds another evidence of 

 man's place in nature as simply one among 

 the various groups of mammals, in the 

 conditions of the physical variation among 

 different human races, or species, as they 

 would likely be called by any entirely 

 disinterested student of human kind. If 

 an expedition of scientific gentlemen from 

 the Academy of Sciences of Mars, say, 

 should some day find its way to our 

 planet, they would doubtless report to 

 their colleagues, on their return, the 

 discovery of a considerable number of 

 earth-inhabiting different species of man, 

 and might issue a classificatory mono- 

 graph on them not unlike one of our own 

 monographs on the various species of 

 16 



