178 
offers a substantial barrier of hard limestone to such an amount of erosion 
on the part of the glacier. Furthermore, the gradients of the lower 
courses of some of the streams, at least, such as A, F and D, where the 
streams are still flowing through till must have been formed prior to the 
presence of the glacier since they are partly plugged with glacial debris. 
It seems likely, then, on the whole, that these streams had cut to grade 
not long prior to the glacial epoch and were rejuvenated together with 
the entire Mohawk system by the elevation which preceded or accom- 
panied the glacial epoch. 
Skuuu oF Fossit Btson. 
By W. G. MIppLETON AND JosEPH Moore. 
Let it be said here, by way of introduction, that Mr. Middleton, of the 
Vincennes High School, as some members of the Academy will remember, 
obtained and reported to the late meeting the above-named specimen, re- 
porting it as probably Bison latifrous, Leidy. Mr. Middleton gave his re- 
port verbally to the Academy, and has recently been in poor health, so 
that he has not been able to give it further study and write it up for 
publication. He, therefore, requests me (J. M.), since the specimen has 
been sent to Harlham College, to forward measurements, photographs and 
whatever notes may seem proper. 
This cranium was found in 1896, a few miles from the city of Vin- 
cennes, Indiana, by a Mr. Brower. It was some six feet below the sur- 
face, partly unearthed by the caving in of the bank of a deep ditch. 
It will be noted that what appears to be the horns are but the horn 
cores—processes of the frontal bones for the support of horns long since 
decayed. The horns, if restored, would add, say a foot to each projection. 
Distance from tip to tip of horn cores, direct line........ : 3 4 * 
Circumference of horn cores near base................ i 0 
From tip to tip of horn cores, line of outer curves....... 3 9 
Width of forehead betweem horns...................0.- 1 3 
Greatest width from outer to outer of orbit borders...... 1 21 
Least width of forehead (between eyes and horms)...... 1 % 
Length of face from occipital crest to anterior of nasals.. 1 9 
“This measurement supposes an inch, more or less, to be restored to the tip of the right 
horn core, which has been broken off. Measurement as it appears in the cut is35 inches. 
