The Cambridge natural history . Australia,and is closely connected with New Guinea. There can be littledoubt that it has been colonised from the latter country, sincean elevation of even 10 fathoms would create (see map) a widebridge between the two. Many of the genera are quite strangeto the rest of Australia. Land operculates are abundant, and ofa Papuan type. Several of the characteristic Papuan genera ofHelix {Papuina, Chloritis, Planispira^ occur, while Hadra attains Fig. 214.—Characteristic Aus-tralian Helices: A, B.(Jladra) j^oimim Pfr. ; B,IF. (Thersites) richmondianaPfr. X g. its maxi

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The Cambridge natural history . Australia,and is closely connected with New Guinea. There can be littledoubt that it has been colonised from the latter country, sincean elevation of even 10 fathoms would create (see map) a widebridge between the two. Many of the genera are quite strangeto the rest of Australia. Land operculates are abundant, and ofa Papuan type. Several of the characteristic Papuan genera ofHelix {Papuina, Chloritis, Planispira^ occur, while Hadra attains Fig. 214.—Characteristic Aus-tralian Helices: A, B.(Jladra) j^oimim Pfr. ; B,IF. (Thersites) richmondianaPfr. X g. its maximum. Panda, Pedinogyra, and Tlicrsites are three remark-able groups in a rich Helix fauna. Parmacocldea is a peculiarform akin to Helicarion. The carnivorous MoUusca are repre-sented by Rhytida, Diplomphalus (New Caledonia), and species of Janella, a slug peculiar to this region, predominant fresh-water genus is Bulinus {Isidora). Am-ptdlaria and Anodonta are entirely absent from Australia andNew

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895