Comparative zoology, structural and systematic - for use in schools and colleges (1883) (20483140998)

Title: Comparative zoology, structural and systematic : for use in schools and colleges
Identifier: comparativezool00orto (find matches)
Year: 1883 (1880s)
Authors: Orton, James, 1830-1877; Birge, E. A. (Edward Asahel), 1851-1950
Subjects: Zoology; Anatomy, Comparative; Physiology, Comparative
Publisher: New York : Harper & Bros.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library



Text Appearing Before Image:
VERTEBRATA. 343 bones " projecting from the pelvis,, which may serve to support the pouch; but a& the Monotremes have the same bones, but no pouch, they doubtless have some other f unc^ tion. These bones are peculiar to animals having no pla- centa, namely, to Monotremes and Marsupials. The brains of Marsupials resemble those of the Monotremes, except that the cerebrum of the Kangaroo covers the olfactory lobes. All have the four kinds of teeth, and all are cov- ered with fur, never with spines or scales. Except the Opossums of America, all are restricted to Australia and
Text Appearing After Image:
Fig. 332.—Virginian Opossum (Didelphys Virginiana). adjacent islands. The Marsupials are almost the only Mammals of Australia, a few species of Kodents and Bats being the only placental Mammals. The Marsupials have here developed into forms corresponding in their habits to the orders of placental Mammals in the rest of the world. The Kangaroos take the place of the large her- bivores—the Ungulates. The Thylacinus and Dasyurus are the marsupial carnivora. Other forms are squirrel- like in shape and habits, and still others are insectivorous.