AUSTRALIAN REGION. 103 
burrowing in floating logs used as landing places, 12 miles from 
the sea, up the Pantai river. The mangrove swamps abound 
with Cerithidium, Terebralia Telescopium, Potamides palustris, 
and Quoyia; Auricula Midae and Polydonta scarabzeus inhabit 
the damp woods. 
11. PApuA AND NEW IRELAND. 
The land shells of New Guinea are nearly all distinct from 
those of the Philippines and Moluccas, and include some related 
to the Polynesian types. The Louisiade Islands to the south- 
east and New Iveland on the north of New Guinea are included 
with it. 
FEV GMIR yee secs cvseset sceecs 30 IEENEEDIE), eGagosodeancsoonoc 3 Leptopoma ...s..s0.00s 1 
INGA veeccsscesescevers 7 BUPIN A ecomesecsneseree 3 Cyclotusieransessstecmett 1 
IBCUMUS ic cceicsswrvc nes ve 2 Ofopomayyecs.ceseaseci 1 Helicinay siensccesncice 2 
Cyrene are numerous in this region. Cyclostoma australe is 
common to the Australian Islands and New Ireland; C. Massencee 
to Australia and New Guinea, and C. Vitrewm to New Ireland, 
New Guinea, the Philippines, and India. 
12. AUSTRALIAN REGION. 
Both fauna and flora of Tropical Australia are distinct from 
those of New South Wales and Tasmania, the principal barrier 
being the desert character of the interior; but the localities of 
the land shells have not been defined with sufficient accuracy to 
show whether they are equally distinct. The most complete list 
is giyen by Prof. E. Forbes, in the Appendix to McGillivray’s 
Narrative of the Voyage of H.M.S. Rattlesnake (1846-50) ; it 
specifies 48 Helices (of which H. pomum is the most conspicuous), 
10 Bulimi, an Achatina, 6 Vitrinas (Helicarion) belonging to the 
mainland, and one from the Lizard Islands, and a dextral Balea 
(australis). Pupa and Helicina (Gouldiana) are only found on 
the islets off the north-east coast, and Pupina (bilinguis) at Cape 
York and the adjacent islets; a portion of the province which is 
densely wooded, and lies within the rain region of the Asiatic 
Islands. Cyclostoma bilabre of Menke’s Catalogue is probably 
West Indian. The fresh-water shells of Australia are Planorbis 
Gilberti, Iridinae ? (Victoria R.), Unio auratus, cucwmoides, super- 
bus (Hyridella), australis, Corbicula 4 species, Cyrena 8, Cyclas 
egregia (Hunter R.), Pisidiwm semen and australe, the last common 
to Timor. 
More recently Cox has described 178 species, belonging prin- 
