. Cassell's natural history. Animals; Animal behavior. NATURAL SQIIRREL FLYIXO I'HAf. and the side membrane extends to the outer finger. They have the outer two fingers of the hand long and equal to each other, or very neai-ly so; the second and third fingers are distiiictly shorter than these; and the inner finger is very short. Their dentition is—Incisors, "; canines, tJ; pre- molai-s, ^; true molars, 1^ = 40. The incisors of the lower jaw are, as usual, long and pointed, and almost horizontal, whilst the upper incisors are large and dilated, so far as the anterior ones are co
. Cassell's natural history. Animals; Animal behavior. NATURAL SQIIRREL FLYIXO I'HAf. and the side membrane extends to the outer finger. They have the outer two fingers of the hand long and equal to each other, or very neai-ly so; the second and third fingers are distiiictly shorter than these; and the inner finger is very short. Their dentition is—Incisors, "; canines, tJ; pre- molai-s, ^; true molars, 1^ = 40. The incisors of the lower jaw are, as usual, long and pointed, and almost horizontal, whilst the upper incisors are large and dilated, so far as the anterior ones are concerned, and the next is smaller than the hindmost. The canine is large, and separated from the first premolar, which is large and compressed, and all the molars have rounded tubercles on them. The Opossum Mouse * of the colonists of New South Wales used to be common in the neighbour- hood of Port Jackson. It is about the size of a common Mouse, and of an ashy brown and grey colour on the upper parts and on the flank membrane ; the rest is white. It belongs to the Flying Phalangers, but its side membrane scarcely extends to the wrist, and the thumb of the hind foot is large. It has only three true molars m each jaw on both sides, and the canine is close to the incisors. It forms part of the sub-genus Acrobata, whilst those already mentioned constitute the sub-genus Belideus {fiiKos, a dart). Finally, the short-eared, white-bellied Taguan Phalanger of the scrub of New South Wales is the type of the sub-genus Petaurus. GENUS TARSIPES.—THE NOOLBENGER, OR Tliis is an Australian curiosity amongst the Marsupials, and is a small, mouse-like thing, with a long muzzle, small ears, long tongue, and very few teeth. Its dental formula is—Incisors, "~^; canines, J^^; molars, |=^. The fore and hind extremities have toes something like those of the Lemur, called Tarsius (Vol. I., page 248). The fore feet have five smallish toes, each thickened at the end, and a minute scale-
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