ORDER PACHYDERMATA. 335 



tween the several tribes of the Pachydermata, and 

 attaches itself in some respects to the order of 

 Ruminantia. Six incisors in each jaw, four canines 

 nearly similar to the incisors, and not surpassing 

 them, and twenty-eight cheek-teeth, forming a con- 

 tinued series, without a void interval, which is only 

 to be observed in man. The sixteen posterior cheek- 

 teeth are similar to those of the Rhinoceros, the 

 Damans, and the Palseotheriums, that is to say, 

 square at top, and with two or three crescents un- 

 derneath. The feet terminated by two large toes, 

 as in the ruminantia, have this difference, that the 

 metatarsian and metacarpian bones are always sepa- 

 rated. The arrangement of the Tarsi is the same 

 as in the Camel. 



The bones of this genus have been found hi- 

 therto only in the plaster quarries of the envi- 

 rons of Paris. We have there recognised five 

 species of them, one about the size of a small 

 ass, with the low form and long tail of the Otter. 

 (A. commune, Cuv.) The fore-feet have on the 

 internal edge a small accessory toe ; one of the 

 size and lightness of the Gazel (A. medium) ; 

 one of the size and nearly of the proportions of 

 the Hare, with two small accessory toes on the 

 side of the hind-feet, fyc. (See Cuv. Re- 

 searches in Fossil Osteology, torn, in.) 

 The Common Pachydermata, which have not the 

 feet cleft, comprehend moreover three genera very 

 similar to each other in the cheek-teeth, and having 



seven on each side of the upper jaw, with square 



2 A 2 



