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as a different species from the ox. M. Daubenton ascertained, that in- 
the anroch there are fourteen pair of ribs ; whilst in the ox, and the 
greater part of the other ruminants, there are only thirteen : in the 
auroch, the legs are longer and thinner than in the bull or buffalo ; 
its tongue, also, M. Gilibert observes, is of a blue colour. 
Those naturalists appear to have been mistaken who have supposed 
that there exist, in the North of Europe, two species, different from 
each other : one without a bunch, which they term the auroch ; and 
the other with, which is considered as the bison. The difference ap- 
pears to be, that which results from the difference of age only ; the 
old male auroch acquiring much longer hairs, and a much larger 
projection, than exists in the female or the young. The identity of 
the auroch with the large wild bull or buffalo of America (Bos 
Avnericanus, Linn.) is not yet determined ; an examination of the 
osteological characters of its skull is therefore desirable. 
Justice to M. Faujas requires the observation, that M. Cuvier has by 
no means established the fact, that the fossil horns of the first species 
are those of the aurochs ; since he has by no means pointed out any 
osteological character which can be considered as deciding the question. 
It is very true, that the difference of size alone is not sufficient to 
determine a difference of species. But when the difference of size is 
enormous, the probability of there existing a difference of species is 
rendered more probable. The prodigious size of these fossil horns is 
attempted to be accounted for by M. Cuvier, on the consideration, 
that the horns grow through the whole life of the animal, and that an 
abundance of nourishment, through a long life, might have had a 
considerable effect in increasing the growth of these horns. But a 
long life does not appear to have been necessary for the production 
of the large horns of this animal ; since M. Cuvier himself observes, 
of the specimen figured by M. Faujas, that “ the skull is of an enormous 
size, although the individual to which it belonged was not very old, 
as appeared by the sutures.” Nor can the magnitude of the horns 
