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Minnesota Academy of Science 



Fig. 1G. 



Fig. 16. Celt showing three dates of chipping by its dif- 

 ferently weathered surfaces. (Plate XVIII.) This common 

 and widely distributed implement type has been named a 

 boucher by Sollas, in honor of Boucher de Perthes, the pioneer 

 discoverer of paleoliths in France. 



Fig. r 



Fig. 17. A turtle-shaped paleolith found 

 (Plate XV.) 



in 



Wisconsin. 



If we take now a general view of the case, we observe at 

 once that in every way in which we make a comparison the 

 Nebraska man is a near repetition of the Paleolithic man of 

 Australia, and of the Neanderthal race of Europe. This is 

 true, for the Nebraska and Neanderthal races, as to the geo- 



