Chapter IV.

1. Animals have very differently-sized mouths, for some have wide, open mouths, as the dog, the lion, and all animals with pointed teeth; other animals have a small mouth, as man, or a moderately-sized one, as the swine. The Egyptian river-horse has a mane like a horse, and a cloven hoof like the ox; it has a flat face; the talus is like that of other animals with cloven hoofs, and it has large projecting teeth; it has a tail like a hog, and utters a sound like the neighing of a horse; it is about the size of an ass, and its skin is so thick that shields are made of it; its intestines are like those of a horse or ass.