. Biology in America. Biology. 162 Biology in America zoogeographer divides the earth into five great rcahns, which are more or less overlapping but which show in a broad way the arrangement of animal life upon our globe. These realms are the Iloloarctic, including North America to Mexico, Eu- rope, northern Africa, and most of Asia; the Neotropical, comprising South and Central America and Mexico; the. Arctic-Alpine | ] Hucisonian Canadian Transition Upper Sonoran Lower Sonoran Tropical Hi','I After U. S. Biolocical ISukvey Ethiopian, Africa, south of the Sahara; the Oriental, India and most
. Biology in America. Biology. 162 Biology in America zoogeographer divides the earth into five great rcahns, which are more or less overlapping but which show in a broad way the arrangement of animal life upon our globe. These realms are the Iloloarctic, including North America to Mexico, Eu- rope, northern Africa, and most of Asia; the Neotropical, comprising South and Central America and Mexico; the. Arctic-Alpine | ] Hucisonian Canadian Transition Upper Sonoran Lower Sonoran Tropical Hi','I After U. S. Biolocical ISukvey Ethiopian, Africa, south of the Sahara; the Oriental, India and most of the Malay Archipelago; and the Australian, Australia, New Zealand, the southeastern portion of the Malay Archi- pelago and the South Sea Islands. In the study of the geographical distribution of animals (especially birds and mammals) in the United States and in the correlation of their distribution with that of plants, the principal agency has been the United States Biological. 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 Young, R. T. (Robert Thompson), b. 1874. Boston, R. G. Badger
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