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SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 59 



are sometimes likely to be met with in digging wells and in places 

 where streams may have cut through the Wisconsin, so as to reach 

 an underlying interglacial deposit. And this suggests that, in the 

 case of every discovery of a Pleistocene fossil, accurate record 

 should be kept of the exact locality, and of the depth and the char- 

 acter of the deposit. Especially ought the record of the locality to 

 be so detailed that anybody can relocate the exact spot. 



The next map (fig. 9) shows the relatively few localities where 

 tapir remains have been found. None of these occur north of the 

 Wisconsin terminal moraine ; in fact, none north of the border of 

 any glacial ,sheet, except at Big Bone Lick where a thin varnish of the 



Fig. 10. — Distribution of extinct species of bison. 



Illinoian sheet covers the locality. It is doubtful whether the re- 

 lation to the Illinoian drift of the tapir remains found there can yet 

 be determined. 



Figure 10 is intended to display the distribution of localities 

 where bisons of extinct species have been found. The writer holds 

 that no authentic discovery of an extinct bison has yet been made in 

 deposits overlying Wisconsin drift. To prove the presence of such 

 a bison it will usually not be sufficient to present teeth only, for the 

 teeth of some of the extinct bisons resemble so closely those of the 

 living species that they cannot be distinguished. As in the case of 

 the horses, remains of undoubtedly extinct bisons have been found 

 close up to the border of the Wisconsin drift, and doubtless will 

 yet be found to occur beneath it. 



