. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. ,;;â « f^ 66d MONOGRAPHS OP NORTH AMERICAN RODBNTIA. erally. Some of them are colorless, like the hairs upon the face; and, indeed, there is upon the bacU of the fore arm n special tuft of long colorless bristles, quite like the shorter whiskers. The long scattered hairs of the upper parts are black, giving a darker tone to the reddish-brown or chestnut of these parts; on the under parts, the cast is more grayish. The basal portion of the pelage is dark plumbeous above, paler or grayiaii bel
. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. ,;;â « f^ 66d MONOGRAPHS OP NORTH AMERICAN RODBNTIA. erally. Some of them are colorless, like the hairs upon the face; and, indeed, there is upon the bacU of the fore arm n special tuft of long colorless bristles, quite like the shorter whiskers. The long scattered hairs of the upper parts are black, giving a darker tone to the reddish-brown or chestnut of these parts; on the under parts, the cast is more grayish. The basal portion of the pelage is dark plumbeous above, paler or grayiaii below. I have not sufficient mute- rial to indicate the range of individual color-variation. Some specimens are said to be quite blackish. None of those examined show a pure white thront- patch, spoken of by some writers; but it is indicated in some cases by a few white hairs. The hands, feet, and ears appear whitish, at least in contrast with the general dark body colors; and the short pelage of the lips, anus, and priEputial sheath is usually more or less whitened. The claws are nearly colorless; the incisors are yellow. The anus is situate a considerable distance from the root of the tail. In the male, owing to the size of the os penis, the sheath of the penis forms a large conical projection immediately in front of the anus, and is directed more or less backward i it is hairy, with a long, slender, terminal pencil. The penis may be readily protruded in alcoholic specimens. There is no appearance of a glans. The bone extends to the end of the member; it is elsewhere described. I have seen no female specimens. There are said by Richardson to be six mammBC, tiie position of which is indicated by brown circular marks, the anterior pair being situated between the tore legs. B.âDE8CBIPTI0N OP TIIE TEETH. The incisors offer nothing specially noteworthy. They are very stout for the size of the animal, their anterior faces perfectly smooth, convex in both directions, the sides mu
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Keywords: ., bookcentury1800, bookdecade1870, bookpub, booksubjectpaleontology
