Alfred Russel Wallace
Island Life Or the Phenomena and Causes of Insular Faunas and Floras
Buch
Excerpt: ... work The Birds of the Sandwich Islands, already alluded to. Reptiles.-The only other vertebrate animals are two lizards. One of these is a very widespread species, Ablepharus pœcilopleurus, ranging from the Pacific Islands to West Africa. The other is said to form a peculiar genus of geckoes, but both its locality and affinities appear to be somewhat doubtful. Land-shells.-The only other group of animals which has been carefully studied, and which presents features of especial interest, are the land-shells. These are very numerous, about thirty genera, and between three and four hundred species having been described; and it is re…
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Excerpt: ... work The Birds of the Sandwich Islands, already alluded to. Reptiles.-The only other vertebrate animals are two lizards. One of these is a very widespread species, Ablepharus pœcilopleurus, ranging from the Pacific Islands to West Africa. The other is said to form a peculiar genus of geckoes, but both its locality and affinities appear to be somewhat doubtful. Land-shells.-The only other group of animals which has been carefully studied, and which presents features of especial interest, are the land-shells. These are very numerous, about thirty genera, and between three and four hundred species having been described; and it is remarkable that this single group contains as many species of 317 land-shells as all the other Polynesian Islands from the Pelew Islands and Samoa to the Marquesas. All the species are peculiar, and about three-fourths of the whole belong to peculiar genera, fourteen of which constitute the subfamily Achatinellinæ, entirely confined to this group of islands and constituting its most distinguishing feature. Thirteen genera (comprising sixty-four species) are found also in the other Polynesian Islands, but three genera of Auriculidæ (Plecotrema, Pedipes, and Blauneria) are not found in the Pacific, but inhabit-the former genus Australia, China, Bourbon, and Cuba, the two latter the West Indian Islands. Another remarkable peculiarity of these islands is the small number of Operculata, which are represented by only one genus and five species, while the other Pacific Islands have twenty genera and 115 species, or more than half the number of the Inoperculata. This difference is so remarkable that it is worth stating in a comparative form:- Inoperculata. Operculata. Auriculidæ. Sandwich Islands 332 5 9 Rest of Pacific Islands 200 115 16 When we remember that in the West Indian Islands the Operculata abound in a greater proportion than even in the Pacific Islands generally, we are led to the...
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Produktdetails
- ISBN: 978-1-153-64797-7
- EAN: 9781153647977
- Produktnummer: 14787685
- Verlag: Books LLC, Reference Series
- Sprache: Englisch
- Erscheinungsjahr: 2013
- Seitenangabe: 216 S.
- Masse: H24.6 cm x B18.9 cm x D1.1 cm 428 g
- Abbildungen: Paperback
- Gewicht: 428
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