Having determined the existence of three or four species in this genus, 

 M. Cuvier proceeded, with patient assiduity, to trace out the remains of 

 the other parts of these animals, and his researches were amply repaid. 

 The structure of the hind-leg was the first object of inquiry. 



Besides other minute peculiarities in the form of each particular bone, 

 dependent on the general structure of the limh, he found that Ano- 

 plotherium commune had, to the hind-leg, two perfect toes articulated with 

 two metatarsal bones, which remained distinct and separate through life. 

 This species of structure is unknown among living animals;, since the 

 ruminating animals, and even the camel, which agrees with this animal 

 in having a separation of the scaphoid and cuboid. bones, have their meta- 

 tarsal bones united through their whole length, in one piece, forming the 

 cannon-bone, and in which, however, its double origin is not concealed. 



The structure of the hind-foot alone, therefore, would have been suf- 

 ficient, if we had' been ignorant of the peculiarities of the head, to have 

 shown, that this animal was of a species at present unknown. From the 

 structure of this part it may also be seen, that this animal agreed in one 

 respect with the pachydermata, and in another with "the ruminants, 

 with which it is connected by the medium of the carnel. 



From the thickness and shortness of these bones, considered as to their 

 length, this animal may be concluded to have been very large propor- 

 tioned to its height a conclusion which will be found to be warranted 

 by the proportions of the bones of its legs and thighs. 



The investigation respecting the hind feet of Anoplotherium medium^ 

 was still more satisfactory than even that respecting A. commune; since 

 a left foot, forked and having two distinct metatarsal bones, was found 

 almost entire, but much smaller and thinner than that already described. 

 This foot, was of a size which would have agreed with that of a sheep of 

 a middling size; and though belonging to the same genus, appeared to 

 warrant the conclusion, that the animal must have been taller and thin- 

 ner, in proportion, thari the preceding species. 



Anoplotherium minus appeared, from an astragalus, which certainly 

 VOL. in. 3 E 



