128 LECTURit IV. 



Ion that he saw one in that state. The Hippo- 

 potamus is a native of the large African and 

 Asiatic rivers, and is sometimes seen in herds. 

 The tusks are much esteemed as a species of 

 ivory, being more hard, and less liable to change 

 colour than those of the Elephant : they are there- 

 fore in great use among the dentists. I shall 

 add, that the Hippopotamus was known to the 

 ancient Romans, and that Pliny tells us that 

 Scaurus a Roman ^dile, treated the people of 

 Rome with the exhibition of an Hippopotamus 

 accompanied by four Crocodiles, all brought out 

 of Egypt, and exhibited in a temporary lake, 

 prepared for that purpose. 



The genus Rhinoceros, which some natural- 

 ists have placed, like the Elephant, among the 

 Bruta of the Linna^an arrangement, is distin- 

 guished by the remarkable circumstance of a 

 horn or process situate above the nose. The 

 mouth is furnished in each jaw with two teeth, 

 placed at the corners of the jaws in the manner 

 of canine-teeth ; and in each jaw are six grinders 

 on a side. The general height of the Rhino- 

 ceros is about eight feet, but specimens are said 

 to be occasionally seen which nearly equal the 



