640 



YERTEBRATA. 



IIU'l'Ol'OTAMl'S. 



THE IIIPPOPOTAMIDJE. 



is a single LT.-ims, 1 1 II 'I'ol'i '>TAMFS, hippopotamus, and a single species, 



the Amphibious Hippopot wp s, //. amphibius. Of this the muzzle is exceedingly thick and Hunt, 



the head is very large, bul the greater part of its bulk is made up of the facial bones, which arc 



ize when compared with the cranium. The lower jaw is of immense size and 



power. Both jaws are armed with teeth of three different sorts, and some of these attain a large 



The incisors an' fonr in each jaw; they arc of a cylindrical pointed form, the two middle 



