fold of the enamel entering deeply into the body of the tooth on one side, and a slight indentation on the opposite side. [Illustration: WOMBAT.] [Illustration: LOWER JAW OF THE WOMBAT.] The number of the persistent teeth is as follows:--Incisors, 2/2; true molars, (4-4)/(4-4). It is the only Marsupial which has an equal number of incisors in both jaws. There are no canines. As the Wombat uses much force in gnawing, the muscles of the jaws and their bony attachments are large; consequently the temporal ridges are strongly marked. There is a deep and strong zygomatic arch, and in the lower jaw the turned-in angle is of great size. The chin is also large, and the joint of the jaw also. The sutures of the bones of the skull are scarcely ever obliterated, and the auditory “bullæ” are formed in the temporal bone. With regard to the marsupial bones, they are long, flat, curved, and, moreover, less expanded near their attachment to the pubis. The ribs are fifteen in number on each side, and the collar-bones are large and stout. There is a curious power of movement of the ankle, so that the foot can imitate the turning movements of the wrist and fore-arm of man. This pronation and supination is because the small bone of the leg, the fibula, is free and not attached to the other bone (tibia), and because there is a muscle whose action is to move the fibula after the fashion of the corresponding muscle in the fore limb. The stomach is smaller than in the Kangaroos, and has a large gland. [Illustration: TEETH OF THE WOMBAT. A, Upper Jaw; B, Lower Jaw; C, Molar.] The Wombat has been found in South Australia, Van Diemen’s Land, Bass Strait, and in New South Wales. CHAPTER II. THE PHALANGER, POUCHED BADGER, AND DASYURE FAMILIES. THE PHALANGER FAMILY--THE KOALA--Habits--Characteristics--THE CUSCUS--THE VULPINE PHALANGER--THE DORMOUSE PHALANGER--Habits--Remarkable Characters--THE FLYING PHALANGERS--Its Flying Machine--Habits--THE SQUIRREL FLYING PHALANGERS--Habits--The Parachute-like Membrane--Exciting Scene on board a Vessel--Characteristics--THE OPOSSUM MOUSE--THE NOOLBENGER, OR TAIT--A Curiosity among Marsupials--Distinctive Features--THE POUCHED BADGER FAMILY--Characteristics--THE RABBIT-EARED PERAMELES--THE BANDICOOT--THE BANDED PERAMELES--THE PIG-FOOTED PERAMELES--Discussion regarding it--Characteristics--THE DASYURUS FAMILY--Characteristics--THE POUCHED ANT-EATERS--THE BANDED MYRMECOBIUS--Description--Great number of Teeth--History--Food--Habits--Range--THE URSINE DASYURE--Appearance--“Native Devil”--Ferocity--Havoc among the Sheep of the Settlers--Trap to Catch them--Its Teeth--A True Marsupial, though strikingly like the Carnivora--Skeletal Characters peculiar to itself--MAUGE’S DASYURE--THE DOG-HEADED THYLACINUS--Description--Resemblance to the Dog--Habits--Peculiarities--THE BRUSH-TAILED PHASCOGALE--Description--Other Varieties. III.--THE PHALANGER FAMILY.--THE PHALANGISTIDÆ.