120 
MAMMALIA. 
Family III.— Solidungula. 
With three kinds of teeth ; only one visible toe, and a strong 
hoof on each foot. 
Genus 13. —Equus. — Linnoeus. 
Generic Character. —Incisors canines J-J, which are want¬ 
ing in the females of some species, grinders £-6; total 40. The 
grinders are furrowed on each side with flat crowns, and several 
ridges of enamel; between the canines and grinders a vacant 
space; upper lip capable of considerable motion ; eyes large; 
ears rather large, pointed and erect; feet with a single visible 
toe, covered with strong hoofs; tail with long hair, or in some 
species with a tuft at its extremity; two inguinal teats ; stomach 
simple and membranaceous ; intestines and caecum very large. 
Equus Caballus. — The Horse. 
Plate XXVI. fig. 1 and 2. 
Hair of various colours; with a long mane and tail; no hu¬ 
meral stripe. Subject to many modifications of form from 
climate and food. 
Supposed to be a native of Asia, being found wild on the tracts which 
, bound the Sea of Arel and the Caspian Sea. Found wild from an eman¬ 
cipated stock in South America. 
Mulus. — The Mule. 
Plate XXVI. fig. 3. 
This is bred betwixt the Horse and Ass. W'hen the sire is a 
Horse and the dam a she-ass, it was termed Hinnus by the 
ancients, and when the sire is a Jack Ass and the dam a Mare 
it was termed Mulus. The latter is considered the best. 
Equus asinus. — The Ass. 
Plate XXVI. fig. 4. 
Fur gray, or brownish-yellow, with a broad dorsal band, and 
a black humeral stripe across the shoulders ; long hair at the end 
