MAMMALIA. 457 
highly developed. The eyes are very large and prominent, and being 
placed laterally, enable the animal, to see in all directions, or nearly so, at: 
the same time. The common hare of Europe (Z. témidus) is figured in 
pl. 107, fig. 5, whilst fig. 6 represents the rabbit or cony (L. cwniculus). 
North America has many species: the polar hare (Z. glacialis), inhabiting 
the northernmost, part.of the continent, its southern limit being 62° north 
latitude. The American hare (1. americanus), found about Hudson’s Bay, 
Canada, Newfoundland, all the New England States, and in the northern 
portions of New York, Pennsylvania, and Ohio; confined to the eastern 
portion of the continent. The swamp hare (LZ. aqguaticus), from Alabama, 
Mississippi, lower part of Louisiana, and even 'exas. The wood hare 
(L, sylvaticus), or common grey rabbit, is found almost throughout the 
United States. The marsh hare (LZ. palustris) inhabits the southern and 
western parts of the United. States. The Nuttall’s hare (L. nuttall’) is 
originally from. the west side of the Rocky Mountains, in the neighborhood 
of the Columbia and Shoshonee rivers. The Bachman’s hare (ZL. bachmant). 
inhabits the south-west portion of North America. The wormwood hare 
(L. artemisie) is. from the Rocky Mountains. The prairie hare (L. town- 
sendi) is found. on both sides.of the Rocky Mountains in the region of 
the Columbia River, and. ranges. eastwards on the Missouri, beyond the 
Yellowstone River. The Californian hare (L. californicus) inhabits Cali- 
fornia, in the open hilly country- which surrounds the harbor of San Diego. 
The Texan hare (L, textanus). The Mexican hare (LZ. nigri-caudatus) in 
Mexico and adjoining parts of California. 
In. South America there is but one species of hare hitherto noticed. 
The remains of a fossil species were discovered in the caverns of Brazil, 
which resemble very closely the species now living in the same country. 
The hares were numerous in Europe during the epoch of the diluvium, 
and resemble also very closely the actual species inhabiting the ancient 
continent. 
Fam. 2. Hysrricipz. The hystricine rodents have four molar teeth 
above and four below, rooted or rootless, and the terminal portion of 
the snout clothed with short hairs. This family may be divided into 
six sub-families. 
Sub-fam. 1. Caviina have rootless molar teeth divided by folds of enamel, 
so as to form lobes having acute angles; the series of molars on opposite 
sides of the upper jaw converging, and nearly meeting in front. The 
incisor teeth are comparatively short, those of the lower jaw not being 
extended backwards as far as the springing of the angular portion, or 
descending ramus. ‘There are four toes to the fore feet and three to the 
hind. The tail is wanting, or rudimentary; the upper lip entire. The 
clavicles are wanting. 
The genus Dolichotis comprehends the cavies provided with long limbs ; 
ears fully half as long as the head, pointed, broad at the base, and deeply 
emarginated behind; the tail is very short, and recurved. The Patagonian 
avy is the only species contained in this genus. 
The genus Cavia (cavies) is composed of species provided with short 
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