SCIENCE OF FOSSIL LIFE 



339 



been collected which supply a panoramic view of the line of 

 descent of horses, of camels, of rhinoceroses, and of other 

 animals. The most fruitful worker in this field at the present 

 time is perhaps Henry F. O shorn, of the American Museum 



FIG. 102. KARL VON ZITTEL, 1839-1904. 



of Natural History, New York City. His profound and 

 important investigations in the ancestry of animal life are 

 now nearing the time of their publication in elaborated 

 form. 



