. Elementary text-book of zoology [electronic resource]. Zoology. MAMMALIA. 477 The temperature of the body is low and inconstant. In all these features the Prototheria show a low grade of struc- ture approximating to the reptilian type. Order I.—Monotremata. There are two families in this order, (i) Ornithorhyn- chid^ and (2) Echidnidse closely allied in many ways. Ornithorhynchiis anatinus or the duckmole, is found in the Fig. 296—Duckmole {Ornithorhynchiis anatinus).. (From Gould's Mammals of Australia.) Australian region. Its general appearance may be seen from the figure. The body usually
. Elementary text-book of zoology [electronic resource]. Zoology. MAMMALIA. 477 The temperature of the body is low and inconstant. In all these features the Prototheria show a low grade of struc- ture approximating to the reptilian type. Order I.—Monotremata. There are two families in this order, (i) Ornithorhyn- chid^ and (2) Echidnidse closely allied in many ways. Ornithorhynchiis anatinus or the duckmole, is found in the Fig. 296—Duckmole {Ornithorhynchiis anatinus).. (From Gould's Mammals of Australia.) Australian region. Its general appearance may be seen from the figure. The body usually about 18 inches long, is covered 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 Hmbs have five digits with claws and a " web " or. 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; Parsons, John Herbert, Sir, 1868-1957, donor; S. H. Lazarus (Firm); University College, London. Library Services. Edinburgh : E. & S. Livingstone
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