著者

蜂須賀 正氏

出版者

日本鳥学会

雑誌

鳥 (ISSN:00409480)

巻号頁・発行日

vol.13, no.61, pp.24-28, 1952

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A rare photograph of two weeks old <b>Notornis</b> of New Zealand is reproduced from a newspaper. <b>Notornis</b> is closely related to <b>Porphyrio</b> and New Zealand has <b>P. poliocephalus melanotus</b> which underwent the same type of evolution as <b>Notornis</b>, only not to that extreme degree. The origin of these two related birds is explained throguh the theory of double invasions. The author believes that species has a termination to its long continued life and <b>Notornis</b> is considered to be a waning species. Like ontogeny is a short repetition of phylogeny, a life of an adult individual is considered as a concise picture of a species it belongs and which one day must reach the end of its specific life.