1897.] _ Anthropology. 647 
else to a subadult individual, or finally, to perhaps a different species. 
It has all the characters however, of a colinine humerus, but is smaller 
than the one just referred to above, and in the absence of other material 
I believe it to be wiser not to pronounce upon it definitely at present. 
Bonasa umbellus—Numerous bones of the Ruffed Grouse were dis- 
covered in these caves. I find in the collection a left humerus and a 
coracoid from the same side; two ulnæ, four carpo-metacarpi (one per- 
fect, the others nearly so), and three tarso-metatarsi with the lower 
half of another. These bones have each and all been carefully com- 
pared by me with several skeletons of Bonasa umbellus in my private 
collections, and I find that they agree in all their characters with the 
corresponding elements of the skeleton as now found in specimens of 
this Grouse of the existing avifauna. 
The collection contains the right carpo-metacarpus of still another 
Grouse, the specimen being nearly perfect. It is but a millimetre or two 
shorter than that bone as it occurs in adult male individuals of Tym- 
` panuchus americanus, being at the same time almost identical in char- 
acter, in fact presenting only such very slight differences as might be 
due to individual eaciation. This bone mey have easily belonged to 
some form of thi d resented in the existing avifauna, 
and in the absence of the balance of the skeleton, I am by no means 
sure it did not. Possibly the former owner of it may have been a female 
T. americanus, or a subadult specimen, or a male T, pallidicinctus and 
so on; while in any event, without more material for comparison, it is 
hardly possible to say with certainty as to what the species was, more 
than it was a Prairie Hen (Tympanuchus). 
Even still more puzzling is the presence in this coliection of the tar- 
so-metatarsus of a Grouse—a perfect bone from the right limb. It does 
not belong to any of the species I described from the Equus Beds of 
Oregon, and it is too small, and at the same time, too stout for any ex- 
isting species of Tympanuchus; too big for a Pediocetes; and too 
small for a female Centrocereus, yet there is no question but what it is 
the typical tarso-metatarsus of a true Grouse. I do not believe it be- 
longs to the same species as the one to which the above described carpo- 
metacarpus belonged, for the bone is not big enough for that quite, and 
yet is just possible that it might have done so. It is far better to wait 
for additional and fuller material to come to light from the locality 
where this bone was collected, before either declaring it to be a new 
species or not having belonged to one now abundantly represented in 
our existing fauna. 
