RHINOCEROS TICHORHINUS. Se 
observed on any living species; and he asks whether it 
does not indicate the Rhinoceros of the Lena to have been 
an aboriginal of the temperate latitudes of Asia ? 
It must not be inferred from the observations which 
Pallas was able to make on the hair of the legs of the 
frozen Rhinoceros, that its body was less warmly clad than 
that of the Mammoth. No naturalist, unacquainted with 
the woolly covering of the arctic Musk Ox, could have 
inferred it from an inspection of the legs only, which are 
clothed with short, dull, brownish-white hair, unmixed 
with wool. 
Of the subsequent discoveries of carcasses of Rhinoceroses 
in the frozen soil of Siberia, I can only learn that they 
prove the hide to have been destitute of those singular 
folds which characterize that part in the existing one- 
horned Rhinoceros ; and that one of the horns, probably 
the first or nasal horn, has been obtained, which measures 
nearly three feet in length, and thus confirms the deduc- 
tions of Cuvier from the osseous septum supporting the 
nasal bones, as to the size of this formidable weapon : it is 
preserved in the Museum of Natural History at Moscow. 
Although the molar teeth of the Rhinoceros tichor- 
hinus present a specific modification of structure, it is not 
such as to support the inference that it could have better 
dispensed with succulent vegetable food than its existing 
congeners ; and we must suppose, therefore, that the well- 
clothed individuals who might extend their wanderings 
northwards durmg a brief but hot Siberian summer, 
would be compelled to migrate southward to obtain their 
subsistence during winter. Plants might then have existed 
with longer periods of foliation than those which now 
grow. This, at least, is a less extreme hypothesis than 
the sudden change from a tropical to an arctic climate, 
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