Zöology; a textbook for colleges and universities . quite different, and is more nearlyrelated to the chamois of Europeanmountains. (A) Perissodactyla. Odd-toed ungulates, includingthe horses, tapirs, and rhinoceroses. Therhinoceros group, now confined to the Ethio-pian and Oriental regions, was once richlyrepresented in America.(i) Proboscidea. Elephants, including mastodons and mammoths. (/) Sirenia, which are aquatic derivatives of theungulate type, as the seals are of the carniv-orous group. The living forms are the mana-tee and (&) Odontoceti, or toothed whales, including do
Zöology; a textbook for colleges and universities . quite different, and is more nearlyrelated to the chamois of Europeanmountains. (A) Perissodactyla. Odd-toed ungulates, includingthe horses, tapirs, and rhinoceroses. Therhinoceros group, now confined to the Ethio-pian and Oriental regions, was once richlyrepresented in America.(i) Proboscidea. Elephants, including mastodons and mammoths. (/) Sirenia, which are aquatic derivatives of theungulate type, as the seals are of the carniv-orous group. The living forms are the mana-tee and (&) Odontoceti, or toothed whales, including dolphins and porpoises. (/) Mystacoceti, the whalebone arrangement of the orders of mammals, as heregiven, does not represent the course of evolution in anyaccurate way, nor is it possible to do so in a single evolution of the mammals has been treelike orfanlike, the several orders diverging along their ownpaths, and not as a rule giving rise to any other. Thiscan be readily demonstrated by a study of the struc- MAMMALS 415. Photograph by E. R. Sanborn, N. Y. Zool. Soc. FIG. 104. Persian wild ass; showing the dorsal stripe which appears to be aprimitive character in the Equidae.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1920
