. The geography of mammals. and Berardius). In conclusion, attention may be called to some of themore remarkable points in the general distribution of themarine mammals and to their apparent significance. In the first place it is evident that the Pacific hasmuch more in common with the Notopelagian Region thanthe Atlantic. Otaria and Macrorhinus, quite unknownin the Atlantic, extend themselves to the northern ex-tremity of the Pacific, the former pervading that oceanup to Bearings Strait, and the latter reaching to theCalifornian coast. It follows that in former ages theremust have been some b
. The geography of mammals. and Berardius). In conclusion, attention may be called to some of themore remarkable points in the general distribution of themarine mammals and to their apparent significance. In the first place it is evident that the Pacific hasmuch more in common with the Notopelagian Region thanthe Atlantic. Otaria and Macrorhinus, quite unknownin the Atlantic, extend themselves to the northern ex-tremity of the Pacific, the former pervading that oceanup to Bearings Strait, and the latter reaching to theCalifornian coast. It follows that in former ages theremust have been some barrier in the Atlantic which didnot exist in the Pacific to stop their progress only barrier one can imagine that would have effectedthis must have been a land uniting South America andAfrica, across which they could not travel. Adoptingthis hypothesis, we have at the same time an explanationof the presence of the Manatee on both the American SNOI03M-VHS 9 3HJL ONIMOHS C 09 08 001 OS! OJt 091 0«t 09T 0*1 OZI. •IMA HJ-VHcl 216 THE GEOGRAPHY OF MAMMALS Seals, Monachus, amongst the Pinnipeds, and of theSirenian genus Manatus. III. Regio Indopelagica, characterized by the presenceof the Sirenian Halicore and by the absence of Pinnipeds. IV. Regio Arctirenica, with Phoca like the RegioArctatlantica, but having Otaria also; the home of the(now extinct) Sirenian Rhytina and of the endemic CetaceanRhachianectes. V. Regio Mesirenica, without true Seals (Phocinte), buthaving Otaria and Macrorhinus from the south; noSirenian being known there. VI. Regio Notopelagica, characterized by four endemicgenera of Phocidse, and by the presence of many Otaria;without Sirenians, but with two endemic forms ofCetaceans (Neobal&na and Berardius). In conclusion, attention may be called to some of themore remarkable points in the general distribution of themarine mammals and to their apparent significance. In the first place it is evident that the Pacific hasmuch more in common with the
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Keywords: ., bookcentury1800, bookdecade1890, bookidgeogra, booksubjectmammals
