Title: Text book of vertebrate zoology
Identifier: cu31924002864761 (find matches)
Year: 1899 (1890s)
Authors: Kingsley, J. S. (John Sterling), 1854-1929
Subjects: Vertebrates; Anatomy, Comparative
Publisher: New York, H. Holt and Company
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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MAMMALS. m known species. It leads an aquatic, burrowing life, and feeds upon worms and small aquatic animals, using its bill as does a duck. Family EchidniDjE. Beak elongate, toothless; tongue elongate, ver- miform ; body with strong spines among the hair. Echidna, with three species from Australia, New Guinea, and Tasmania, has all the toes clawed. In Acanthoglossus, from New Guinea, there are claws on but three toes, and the beak is longer. All of these spiny ant-eaters are burrowing animals, feeding chiefly upon ants. Echidna occurs as a fossil in the Australian pleistocene.
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Fig. 356. Duckbill, Ornithorhynchus paradoxus, from Liitken. The earliest fossil mammals yet found occur in the triassic of North Carolina, South Africa, and Germany. Little is known of them except of their jaws and teeth. Allied forms are more abundant in later rocks, and some of them persist uhtil the eocene. From peculiarities of the teeth, which pre- sent certain resemblances to the embryonic teeth of Ornitho- rhynchus, these fossils are sometimes placed as members of the Prototheria, an example followed here; although they also present resemblances to the marsupials. ORDER II. PROTODONTA. Incisors reduced, molars with compressed cutting crowns and undivided roots. Represented only by lower jaws of Droma- iheriuni and Microconodon from the American Jurassic. ORDER III. MULTITUBERCULATA (ALLOTHERIA). Incisors enlarged, molars tuberculate with distinct roots. In these forms, which are represented by several genera, the teeth

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