. The geography of mammals. Fig. 42.—The Atlantic Walrus.(Trichcchus rosmarus.) (Cystophora) exclusively confined to it. In the NorthPacific all the four true Seals belong to the genus Phoca,and three of them are identical with the North Atlanticspecies; but when we descend as far south as the Gulfof California on the American coast we meet with a speciesof Sea-elephant (Macrorhinus) which, like Otaria, has no MARINE MAMMALS 201 doubt penetrated thus far from its ancestral abode in theAntarctic Ocean. Returning to the central Atlantic we find two speciesof Seals inhabiting these waters, both b
. The geography of mammals. Fig. 42.—The Atlantic Walrus.(Trichcchus rosmarus.) (Cystophora) exclusively confined to it. In the NorthPacific all the four true Seals belong to the genus Phoca,and three of them are identical with the North Atlanticspecies; but when we descend as far south as the Gulfof California on the American coast we meet with a speciesof Sea-elephant (Macrorhinus) which, like Otaria, has no MARINE MAMMALS 201 doubt penetrated thus far from its ancestral abode in theAntarctic Ocean. Returning to the central Atlantic we find two speciesof Seals inhabiting these waters, both belonging to the samegenus, Monachus. One of these (M. albiventer) inhabitsthe Mediterranean and the adjoining coasts of the Atlantic,. Fig. 43.—The Common Seal. (Pitoca vitulina.) while the other (M. tropicalis) is in these days restricted tosome of the smaller and less known islands of the WestIndies. The Phocidse of the Antarctic Ocean all belong to generadistinct from the Arctic forms and more nearly allied toMonachus, the Seal of the Mid-Atlantic. They are offour species, belonging to as many genera: Ogmorhinus, 202 THE GEOGRAPHY OF MAMMALS Lobodon, Leptonyclcotes, and Ommatophoca. Besides thesethe Sea-elephant of the whalers (Macrorhinus) is essentiallyan Antarctic form, though now nearly extinct there, after
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Keywords: ., bookcentury1800, bookdecade1890, bookidgeogra, booksubjectmammals
