| Streptaxis (?) | 1 |
| Rhytida | 1 |
| Paryphanta (?) | 1 |
| Helicarion | 2 |
| Xesta | 1 |
| Macrochlamys | 1 |
| Hemiplecta | 3 |
| Microcystis | 2 |
| Trochomorpha | 22 |
| Nanina (?) | 2 |
| Patula | 1 |
| Thalassia | 2 |
| Chloritis | 3 |
| Philina | 2 |
| Hadra | 3 |
| Papuina | 50 |
| Merope | 1 |
| Corasia (?) | 10 |
| Placostylus | 16 |
| Partula | 13 |
| Succinea | 1 |
| Melania | 18 |
| Diplommatina | 2 |
| Pupina | 4 |
| Leptopoma | 4 |
| Omphalotropis | 2 |
| Cyclotus | 1 |
| Cyclotropis | 2 |
| Helicina | 7 |
| Unio | 1 |
(b) The Queensland Province.—The strip of coast-line from Cape York to the Clarence R. stands apart from the rest of Australia, and is closely connected with New Guinea. There can be little doubt that it has been colonised from the latter country, since an elevation of even 10 fathoms would create (see map) a wide bridge between the two. Many of the genera are quite strange to the rest of Australia. Land operculates are abundant, and of a Papuan type. Several of the characteristic Papuan genera of Helix (Papuina, Chloritis, Planispira) occur, while Hadra attains its maximum. Panda, Pedinogyra, and Thersites are three remarkable groups in a rich Helix fauna. Parmacochlea is a peculiar form akin to Helicarion. The carnivorous Mollusca are represented by Rhytida, Diplomphalus (New Caledonia), and Elaea. One species of Janella, a slug peculiar to this region, occurs. The predominant fresh-water genus is Bulinus (Isidora). Ampullaria and Anodonta are entirely absent from Australia and New Zealand.
Fig. 214.—Characteristic Australian Helices: A, H. (Hadra) pomum Pfr.; B, H. (Thersites) richmondiana Pfr. × ⅔.
Map D. To face page 322.
MAP
to illustrate the relations
OF THE LAND MOLLUSCA OF
NEW GUINEA WITH THOSE
OF NORTH AUSTRALIA.
The red line marks the 100 fathom line
London: Macmillan & Co.
Land Mollusca of the Queensland Province