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entirely different from the common buffalo and the arne , as well as 
from the ox and the aurochs. 
These skulls have been found on the banks of the rivers in the 
furthest parts of Siberia ; but sufficient is not yet known of the situ- 
ation in which they are found, to allow of the ascertaining of the 
nature and comparative age of the beds in which they are found. 
Arguing upon what is known respecting these fossils, M. Cuvier con- 
cludes, that they are cotemporary with the elephant with long alveoli, 
and with the rhinoceros with a long skull. This he, however, admits 
cannot be received as certain, until we obtain more exact accounts 
respecting the places in which they were found. 
To M. Pallas we are likewise indebted for the knowledge of another 
species of fossil skulls found in Siberia. Of these he found only two : 
one on the borders of the Ob, and the other on the side of Tuadra. 
Nov. Com. Petrop. xm. p. 601. These skulls are chiefly character- 
ized by the near approximation of the bases of the horns. M. Pallas, 
at first, suspected that these skulls were similar to those of the buffalo 
of the Cape ; but soon after found reason to attribute them rather to 
the musk-ox f Bos moschatus ) of Canada. M. Cuvier is fully dis- 
posed to concur with M. Pallas in his last opinion. 
Admitting the identity of these skulls with those of the musked ox 
of America, Cuvier observes, that it should be remarked that they are 
in a relative position very different from that of the other fossil bones 
of that country. The only analogues with these latter, which it is 
supposed that we have found, are in the torrid zone, &c. : but the musk 
ox dwells in the frigid zone. It is therefore, he thinks, probable, 
that if these skulls actually belong to this animal, they will be found 
to have been deposited in depths, and in beds, very different from 
those which have furnished the bones of elephants, rhinoceroses, and 
large buffaloes. 
Reviewing these facts, relative to the remains of ruminants found 
in alluvial tracts, M. Cuvier offers the following remarks. 
