File:The American Museum journal (c1900-(1918)) (17971992180).jpg

Title: The American Museum journal
Identifier: americanmuseumjo10amer (find matches)
Year: c1900-(1918) (c190s)
Authors: American Museum of Natural History
Subjects: Natural history
Publisher: New York : American Museum of Natural History
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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FOURTH JOURXEY TO THE SOUTH SEAS 127 the principles of geographical distrihiition. P^ach island possesses its own species, while its different valleys have forms that are usually markedly different. For instance, in the valley of Tipaerui of Tahiti the examples belonging to the species Pdrfuhi otalieitana are almost all twisted to the right, and all of them are rather small, brown and streaked. Their relatives in the magnificent valley of Fautaua, a half mile distant, are larger, vellower and redder, but the fact of ijreater interest is that the shells of a large proportion of them twist to the left. In Hamuta
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FISHING SCENE IN RAIATEA, SOCIETY ISLANDS Distributing the fish caught for a cHstrict feast Valley, just beyond Fautaua, the right-handed and left-handed members of the species are about ecjual in numbers, while in Pirai Valley beyond they are all left-handed. This last valley is the home of a small form, Parfula filosa, that grows nowhere else in this island, in the group of islands or in the world. When the collections are sorted out according to species and varieties and according to their geographical source, they give ample evidence to

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