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belonged to the same animal to which the preceding tooth belonged. 
Besides the longitudinal striae and grooves observable in the enamel of 
its sides and inferior part, it is characterized by strong transverse 
rugous markings, which are placed at nearly regular distances, of 
about two inches ; and are observed to exist in the same manner on 
the fragment of about eight inches in length, which joins to it. 
3. A fragment of a tusk, or lower canine tooth, which is only about 
half the size of the preceding specimen. It has the markings of its 
enamel of a different character from that of the larger tooth, and par- 
ticularly is devoid of those transverse rugous markings which are so 
strongly formed in that specimen. From the roundness of this spe- 
cimen in its circumference, and from the difference of its character, 
I am led to suspect that it may have belonged to the small hippopo- 
tamus, which, as will be presently observed, was discovered by Cuvier, 
and which is only, as yet, known in a fossil state. 
4. One of the anterior grinders. 
5. One of the last molar teeth of the right side of the lower jaw, and 
which does not appear to have long pierced the gums. Plate XXI. Fig. 1. 
Among the most important discoveries made by M. Cuvier, is that 
of a small fossil hippopotamus, of not more than half the size of the 
common species. 
The remains of this animal were found in two pieces of sand-stone, in 
which the bones and teeth were disposed in a manner much resembling 
that which is observable in the calcareous and stalactitic masses from 
Gibraltar, Dalmatia, and Cette. Unfortunately, no traces existed by 
which it could be known where this sand-stone had been found. 
After extricating, with extreme care, such bones as could be 
removed, and as served to demonstrate the species, M. Cuvier was 
gratified by finding that they belonged to an animal, the existence of 
which had never been imagined. This animal, it is evident, from the 
minute and close comparisons which were made, must have agreed, 
most exactly, in every character with the genus Hippopotamus ; and 
