...Among the mammals the curious marsupials,of which our southern opossum is an example,furnish good illustrations of this general truth... 
Clarence M. Weed 「Butterflies Worth Knowing」
...Comments on the taxonomy and geographic distribution of some North American marsupials, insectivores, and carnivores...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...Gastrulation is still more modified and curtailed cenogenetically in theplacentals than in the marsupials...
Ernst Haeckel 「The Evolution of Man」
...The Marsupials aredistinguished by a peculiar hook-like bony process that bends from the cornerof the lower jaw and points inwards...
Ernst Haeckel 「The Evolution of Man」
...On the strength ofthis paleontological fact, we may suppose that they belonged to Marsupials...
Ernst Haeckel 「The Evolution of Man」
...From the comparative anatomy and ontogeny of the existing Marsupials we maydraw very interesting conclusions as to their intermediate position between theearlier Monotremes and the later Placentals...
Ernst Haeckel 「The Evolution of Man」
...Even before this partition has been formed in the Marsupials and Placentals, wesee the first trace of the external sexual organs...
Ernst Haeckel 「The Evolution of Man」
...Yet somehow into Australia with its queermonotremes and marsupials entered triumphant man—man and the dog withhim...
Robert Marett 「Anthropology」
...Lowans and other desert birds and marsupials appear never to approachthe watering-places...
Ernest Giles 「Australia Twice Traversed, The Romance of Exploration」
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