180 
(It will be noted that the premaxillaries and a portion of the maxil- 
laries are wanting With these restored the face would be six to eight 
inches longer.) 
Ft. In. 
Greatest width: of occiput, right and left..............-. al Y% 
Greatest width of occiputal condyles, right and left...... 0 5% 
The horn cores at base are warty and spurred; throughout their length 
they are ridged and grooved. 
A cross section of these cores at almost any point would give, approxi- 
mately, a circle having an irregularly notched border. 
The face is slightly depressed between the eyes, but the forehead 
above the eyes is moderately convex, both vertically and crosswise. This 
latter feature is the more marked immediately below the occipital crest. 
The cranial cavity is perfect; so are the zygomatic arches. The maxil- 
laries, aS will be seen from photograph No. 2, are quite defective. The 
left maxillary has two fragmental grinders, second and third, numbering 
from behind. 
We have called this a Fossil Bison, but the fact that it was found 
several feet below the surface does not, of itself, prove it to represent a 
species different from the ordinary recent (though almost extinct) “buf- 
falo’—Bison bison. Remains of our recent bison have many times been 
found in peat, loam, loess and in ordinary marsh ground. 
This specimen from Vincennes bears a close resemblance to the mod- 
ern buffalo in many details, and yet it is evidently specifically different. 
Prof. F. A. Lucas, of the U. 8. National Museum, in his Memoir on the 
Fossil Bison of North America, describes the following six species—B. 
occidentalis, B. antiquus, B. crassicornis, B. alleni, B. ferox, and B. lati- 
frons. This Vincennes specimen is not B. latifrons, as we suggested at 
the meeting of the Academy, as is clearly ascertained from further study 
and comparison. 
I'rom the size (and this is evidently a well-matured skull), from the 
length, diameter, direction, curvature and taper of the horn cores, we 
announce it, somewhat cautiously, as B. antiquus Leidy. In all of the 
above named particulars, and others we might name, it agrees much more 
nearly with said species than with our living bison. 
Remains of B. antiquus have heretofore been found in two localities in 
California and at Big Bone Lick in Kentucky, 
