. Elementary text-book of zoology. 492 CBORDATA. Order I.—Monotremata. There are two families in this order—(i) Ornithorhyn- chidse and (2) Echidnidse, closely allied in many ways. Ornithorhynchus anatinus, or the duckmole, is found in the Australian region. Its Fig- 337-—Fore (A) and Hind (B) general appearance may Foot of the Duckmole. be seen from the figure. The body, usually about 18 inches long, is cover- ed with dense, soft, brownish hair, and the head has a remarkable pair of horny " ; The eyes are small and, as in most aquatic forms, there is no external ear. Both pair
. Elementary text-book of zoology. 492 CBORDATA. Order I.—Monotremata. There are two families in this order—(i) Ornithorhyn- chidse and (2) Echidnidse, closely allied in many ways. Ornithorhynchus anatinus, or the duckmole, is found in the Australian region. Its Fig- 337-—Fore (A) and Hind (B) general appearance may Foot of the Duckmole. be seen from the figure. The body, usually about 18 inches long, is cover- ed with dense, soft, brownish hair, and the head has a remarkable pair of horny " ; The eyes are small and, as in most aquatic forms, there is no external ear. Both pairs of limbs have five digits with claws and a " web " or membrane is present in the front limb, none in the hind. The tail is flat, and in old specimens the hair is absent from its lower surface. In habits the duckmole is " fossorial" and "; It swims freely and lives in deep burrows in river-banks. At the end of its burrow it constructs a nest in which it lays its eggs. There are no teats and the mammary glands are modified sudorific glands. The teeth are only present in the young and adolescent forms and appear to be worn away early, when they are replaced by the familiar horny pads or " cornules" found in most skulls. The teeth are only molars and few in number, eight. Note the webbed fore-foot and the poison-spiir (rt) on the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Masterman, Arthur Thomas. Edinburgh, E. & S. Livingstone
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