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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 specimen 

 in its circumference, and from the difference of its character, I am led to 

 suspect that it may have belonged to the small hippopotamus, 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 com- 

 mon 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 must have differed, not essen- 



