. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. Fig. 52. The "duckbill," Ornithorhyn- chus, an Australian monotreme with webbed toes and a ducklike bill. (After Beddard.) Fig. 53. The spiny anteater, Ech- idna, a monotreme. (From New- man, The Phylum Chordata, copy- right 1939, by permission of The Macmillan Company, publishers. After Vogt and Specht.) In Ornithorhynchus (Fig. 52) the beak is large and flattened, giving rise to the name of "duckbill" for this creature, a name all the
. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. Fig. 52. The "duckbill," Ornithorhyn- chus, an Australian monotreme with webbed toes and a ducklike bill. (After Beddard.) Fig. 53. The spiny anteater, Ech- idna, a monotreme. (From New- man, The Phylum Chordata, copy- right 1939, by permission of The Macmillan Company, publishers. After Vogt and Specht.) In Ornithorhynchus (Fig. 52) the beak is large and flattened, giving rise to the name of "duckbill" for this creature, a name all the more appro- priate because it lives much of the time in water and has feet with webbed toes like those of a duck. The "incredible duckbill" is a native of South Australia and Tasmania. Echidna, the spiny anteater (Fig. 53), is found in Australia, Tasmania, and New Guinea. Proechidna, distinguished from Echidna by an unusually long snout that gives it a "ridiculous resemblance to a miniature elephant," is confined to New Guinea. b. Subclass METATHERIA Order Marsupialia.—The metatheria (meta, after; ther, beast), com- prising the single order marsupialia, are primitive, or possibly degenerate, mammals whose young, born prematurely in an extremely helpless condi- tion, are fed upon true milk and carried about in a permanent brood pouch, 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 Walter, Herbert Eugene, b. 1867; Sayles, Leonard Perkins, 1902-. New York : Macmillan Co.
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