409 
it being very plain, that the lower part of the os fenioris had been 
carried away before it had been incrusted. 
In complete confirmation of the propriety of the previous arrange- 
ment which had been made of the separate bones, this specimen 
showed that the number of ribs was twelve, again pointing out that 
analogy with the camel which had been already seen in several of the 
other bones. But the most novel, and at the same time the most 
unexpected character, demonstrated by this specimen, was, the vast 
magnitude of the tail, which had at least twenty-two vertebras, and 
which equalled, if it did not even surpass, the body in length. From 
the thickness of its vertebrae, and the projection of their apophyses, it 
is evident that the muscles of the tail must also have been of consider- 
able size ; and, indeed, the traces left on the stone give reason for con- 
cluding that the thickness of the tail of this animal must have been as 
enormous as its length. 
Soon after making the necessary remarks on the preceding specimen, 
M. Cuvier obtained part of a second skeleton of the same animal, 
found in the quarries of Antony. The quarries of this part are nearly 
a hundred feet under ground, and descend at least fifty or sixty feet 
under the river de Bievre. The principal mass of gypsum, which oc- 
cupies the bottom of the quarry, is about eight feet thick, and is covered 
by a great number of beds of different kinds of marl, intermixed with 
some small beds of gypsum, in one of which this skeleton was found. 
From this skeleton, also, much important information was obtained 
respecting this animal ; particularly, that the number of incisive teeth 
is six : the lumbar vertebra also six ; the transverse processes of which, 
particularly of the four last, being extremely long and wide : the sacral 
vertebrae three, all very strong, and provided with very large apo- 
physes, such as would have been necessary for supporting the enor- 
mous tail of this animal. The fore -foot was also found almost whole, 
and possessed precisely the characters which had been supposed, from 
a view of the separate bones. 
VOL. III. 3 G 
