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Fragments of fossil bison and allied forms have for a century, more 
or less, been called in a general way remains of a great American ox. 
The accompanying plates, with the measurements, will aid the reader 
as to the size and form of the cranium we are studying. We are indebted 
to Prof. R. W. Barrett for photographs, also to Dr. J. Lindahl, of Cincin- 
nati, for photographs of B. latifrons for comparison. 
