. Cassell's natural history. Animals; Animal behavior. • OF TUE KAXGARi ;ii-e at the sule of the end of the muzzle, are slit like and ', and there are bristly " smellers" to the fieshy lips and chin. A slender tongue is sometimes seen for an instant whilst the Kangaroo is feeding, and if the bones of the jaws be examined, the angle, or lower part of the back of the lower jaw, will be found to be turned inwards. The long jaws have not very many teeth, and there are two large lower front ones, or lower incisors, which project in a line with the lower jaw; they are
. Cassell's natural history. Animals; Animal behavior. • OF TUE KAXGARi ;ii-e at the sule of the end of the muzzle, are slit like and ', and there are bristly " smellers" to the fieshy lips and chin. A slender tongue is sometimes seen for an instant whilst the Kangaroo is feeding, and if the bones of the jaws be examined, the angle, or lower part of the back of the lower jaw, will be found to be turned inwards. The long jaws have not very many teeth, and there are two large lower front ones, or lower incisors, which project in a line with the lower jaw; they are horizontal and more or less pointed, Init have an outer and inner cutting edge. The upper incisors, six in number, tht each side of Th, y are I, and tooth ir pre- 1 both = the middle line, are placed on the pre-maxillary bone, and they work up and down liroad and have the cutting edge below, and the outer one, on each side, is broad, groov complicated by one or two folds of its enamel, which are continued from the outer side of tl obliquely forward and inward. There is a space or diastema behind the incisors. There are fi niolars, one on each side of both jaws, and then follow four molar teeth above and below and sides of the mouth. The dental formula is thus—Incisors, [Ei'; premolars, ,E,; molars, ^_ Tliere ai-e no canine teeth in the adults, but their germs may be found in the very young Kangaroos. As the Kangaroo is a vegetable feeder, and delights in grass, leaves, and heibs, its teeth are eminently of a non-carnivorous kind. It may be remarked that when the month is closed, the cutting edges of the upper incisors come against the outer cutting edge of the long front teeth of the lower jaw. The true molars increase in size from front backwards; and the crown of each molar is squarish, but is longer than broad, and it has two principal cross ridges, which, when not worn, are tall, and have shai-p edges. Besides these, there are two other transverse ridges which are
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecta, booksubjectanimals
