URSIDA. — CXCIX. 339 
Famity CXCIX. URSIDAX. (THE Bears.) 
Plantigrade Carnivora having the body thick and clumsy. Tail 
rudimentary. Teeth 42; molars broad and tuberculated, accord- 
ing with the omnivorous diet. Genera 5; species few and widely 
distributed, —in North America, there are probably but three, 
although many have been described, the Polar Bear, Thalarctos 
maritimus, and the following. 
a. Snout depressed, so that the profile does not form a straight line; soles not 
tally furred; ‘Glaws, moderates (2s, 6. 6 se, «+s URSUS, 590, 
595. URSUS Linneus. (Lat., bear.) 
1123. U. americanus Pallas. Brown, BLAcK oR CINNAMON 
Berar. Color black or brownish, exceedingly variable, a fact which 
has given rise to numerous nominal species, but the several forms or 
varieties intergrade perfectly. N. Am., abundant, where not exter- 
minated. 
1124. U. horribilis! Ord. Grizzty Bear. Grizzly gray or 
brownish. Largest of the bears, reaching a length of 9 feet and a 
weight of 800 lbs. Neb. to Cal., in the mountains. Very near the 
European bear, U. arctos L. but larger. 
Famity CC. MUSTELIDA. (THE WEASELS.) 
Carnivora either plantigrade or digitigrade, with the toes 5-5. 
Molars 3:4 (rarely 4:1); the upper and the last lower one tubercular ; 
sectorial premolar without tubercles; no cecum. Most species pro- 
vided with glands near the anus which secrete a fetid liquid. Some 
are strictly carnivorous while others are rather omnivorous. Size 
usually median or small. Mustelide are found in all parts of the 
earth excepting the Australian region. Some of the species are 
aquatic, and one (Euhydris, the Sea Otter) presents numerous 
analogies with the Seals. 
a. Skull with the cerebral portion swollen backwards and outwards, the snout 
short, high and truncate forwards; toes webbed, the feet adapted for 
swimming; teeth 36. Aquatic. (Lutrinw.) . . . . . LuTra, 596. 
aa. Skull with the cerebral portion posteriorly somewhat compressed, the 
snout produced, attenuate and transversely convex above; feet scarcely 
webbed; mostly not aquatic. 
6. Auditory bulla little inflated, constricted; last upper molar above quad- 
1 ‘* Coward, — of heroic size 
In whose lazy muscles lies 
Strength we fear and yet despise ; 
Savage, whose relentless tusks 
Are content with acorn husks; 
Robber, whose exploits ne’er soared 
O’er the bee’s or squirrel’s hoard ; 
Whiskered chin and feeble nose, 
Claws of steel on baby’s toes.” (Bret Harte.) 
