THE STORY OF NINETEENTH-CENTURY SCIENCE 



A lemuroid form of mammal, believed to be of the 

 type from which man has descended, has also been found 

 in these beds. It is thought that the descendants of this 

 creature, and of the other "Old -World" forms above 

 referred to, found their way to Asia, probably, as sug- 



TITANOTHERE FROM SOUTH DAKOTA 

 In the American Museum of Natural History 



gested by Professor Marsh, across a bridge at Bering 

 Strait, to continue their evolution on the other hemi- 

 sphere, becoming extinct in the land of their nativity. 

 The ape-man fossil found in the tertiary strata of the 

 island of Java two years ago by the Dutch surgeon Dr. 

 Eugene Dubois, and named Pithecanthropus erectus, may 

 have been a direct descendant of the American tribe of 

 primitive lemurs, though this is only a conjecture. 



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