MAMMALIA. 
11 
70. OVIS MONTANA. ROCKY MOUNTAIN SHEEP. (F. B. A. No. SO.) 
Timbered parts of the Rocky Mountains, and hilly countries between that range and the Pacific, 
from North California to the 62nd parallel. The Kamtschatka argali, described and figured by 
Eschscholtz in the Zoologischer Atlas (pi. 5), appears to be sufficiently distinct from the American one. 
Pteropus pselaphon. Lay’s Pteropus. 
Pteropus pselaphon. Lay, Zool, Journ. No. 16, May, 1829. 
PLATE II. 
This pteropus bears considerable resemblance to the “ roussette laineuse” of M. 
Temminck, in its external form; but the interfemoral membrane is more developed, and 
the colours of its fur quite different. It is very numerous in the island of Bonin, (Loo 
Choo,) where it feeds on the fruits of the Sapota and Pandanus. A detailed account of 
it is given by Mr. Lay, in the work above referred to. # 
Mr. Collie makes the following observations on its habits: — “ During the day, these 
bats were generally observed hanging or climbing among- the branches of the trees, the 
head almost always lowest and at right angles with the body, suspending themselves by 
one or both hind claws. They not unfrequently came down close to our men, and were 
caught. Sometimes they alighted from an adjoining tree, at other times they ran down a 
branch to pick off one of the fruits. In all cases, I believe, they ascended by climbing, 
and they never seemed to be aware that they were taking a short branch, until they came 
to its termination, when they tried all round for something to cling to, seldom trusting 
themselves to their wings on such occasions. In the night we heard a loud and frequent 
screeching, which we attributed to these animals.” 
* Mr. Collie having dissected several specimens with great care, we shall here quote a few of his notes. — Length of 
the animal, from the forehead to the coccyx, (the face being at right angles to the spine,) 7 inches. Extent of wings, 37 
inches. Length of the intestinal canal from the cardia, 90 inches. When the wing membrane is extended, the nail of 
the index finger is half sheathed. Slender bands of muscular fibres, ending in fine tendons, lie between the two sur- 
faces of this membrane. The third eyelid has a black lunated margin, which can be brought nearly to the middle of 
the eye. The tongue is very large, and is folded within the mouth. It is covered above with fleshy papilla pointing 
backwards, each tipped with from two to four fleshy spines. Lining of the mouth rugous, admitting of great dilatation. 
Parotid gland , large. Sterno-mastoid muscle having a clavicular origin, about a quarter of an inch from the sternal one, 
Mr. Collie says, “ This double origin being contrary to that described by Baron Cuvier as peculiar to the bat tribe, I ascer- 
tained that I was correct, by dissecting another specimen.” Liver , consisting of three lobes, the middle one bipartite ■ 
lobulus spigelii, large. Spleen long and narrow, in the female lying close to the fundus uteri. No omentum ; no circa. 
Penis, 1) inches long, with a hard cartilaginous saddle-formed substance near the point above. 
