can River beds) of Driftwood Creek, Hitchcock Co., Neb. It was associated 
with Mylagaulus monodon No. 8328, M. sesquipedalis No. 8330 and Eucastor 
tortus No. 8333. These specimens were evidently picked up loose, and although 
all are weathered in much the same way, it cannot be positively stated that all 
are of the same geologic age. The associated specimens are characteristic species 
of the late Miocene and early Pliocene fauna; it is probable that the human tooth 
has come from some overlying Pleistocene or recent deposit and been dropped 
down into the older bed. 

