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differences, and not having been able to obtain the incisors and canine 
teeth adherent to the jaw with a grinder, M. Cuvier hesitates at de- 
termining this tooth to belong to an animal of this genus. 
With these teeth, which are rather smaller than those of Palceo- 
therium medium , two fragments of os humeri, very closely cor- 
responding, as to size, were also found. 
The remains of another species, approaching to the palceotherium, 
was found by the Professor Herman, of Strasbourg, in the department 
of the Lower Rhine, in the mountain of St. Sebastian, one of the lowest in 
the chain of Vosges, in a calcareous bed mixed with fresh-water shells, 
and what is very remarkable, covered, as in the beds of gypsum which 
contain the palceotherium in the neighbourhood of Paris, with several 
beds full of marine productions. This animal, like the palceotherium, 
had both canine and incisive teeth, but it had one molar tooth less, and 
had not the space which in the palceotherium exists between the first 
molar and the canine tooth. The other observable specific characters 
of the lower as well as of the upper jaw, leave no doubt that the animal 
to which these teeth belonged nearly approached to the palceotherium. 
Having placed before you a sketch of the interesting discoveries 
respecting the genus Palceotherium, I shall proceed to give you a 
slight view of the discoveries respecting those animals whose remains 
were found with these, but which did not possess canine teeth : to 
the genus comprising which was given the name Anoplotherium. 
It has been already remarked, that among the teeth which Cuvier 
had discovered, some of the grinders appeared to belong to an animal 
which had no canine teeth. These grinders, which were thought to 
somewhat resemble those of the Palceotherium, are found to differ 
from them in the following respects. The outer surface of the lower 
grinders has not cylindrical, but conical convexities, narrowing very 
much upwards. These convex portions are three in number in the 
last grinder, and two in the two next. Towards their base, their 
curve becomes double ; that is to say, that they are convex, not only 
