ae 
247 
19. Castor fiber, 
as _Leporide. 
21. Lepus Americanus, Lab., Hare. 
a : 
22. Arvicola xanthognata, Leach, Meadow Mouse. ° 
23. A. riparius, Ord. in Godman, Marsh Mouse. 
L 
= 
18. The opossum is rare; his favorite food, the pers 
county. : 
immon, is not found in the 
19. Beaver dams are still found in a dilapidated condition along our streams, but 
since the settlement of the county in 1805. be 
21. The hare is common, and does considerable mischief to our nurseries and 
young orchards, by gnawing the bark off the trees during winter. ts 
22. One of these little animals was found in its large nest lined with rabbit's 
far, on the outside of the wall of a well thirty feet below the surface of the earth ! 
23. The animal which I have designated Arvicola riparius, may be a different 
Species, perhaps a new one. It varies from the description given by Godman as 
follows : the tail is not “ nearly the length of the body,” and is covered with short 
brown hairs, except a few elongated ones at the tip, and these converge to a point; 
On the closest inspection, but fowr teats were found, and these were situated be- 
en the hind legs, and were conspicuously large. Three young ones only were © 
obtained with the female which was brought to me: Its toes are fringed with 
irs which project over the nails. In other respects it accurately accords with the 
¢ ters of 2. riparius. My specimens are about four inches long, from the tip 
of the snout to the end of the tail; the tail is eight tenths of an inch long. Its 
Worms, were rather sluggish in their movements, and in a few days, without any 
apparent cause, they died. They had received no injury in capturing them. One 
was a male, the other a female. 
Godman says the upper molar teeth of the rat (Mus) are very remarkable for 
being inclined from before backwards.’ On looking over a considerable number 
of skulls in my cabinet, I find the molar teeth of the above animal, and of the 
Lepus i , &c. quite as conspicuously inclined backwards as those of the 
Tat, 
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