GEOaRAPHICAL DISTRIBUTION. l43 
Chinese Dipsas plicata^ the new Dipsas hellua, and a species of Modiola 
[see infra]. No Clausilia or Pupa is mentioned. 
Borneo. The known land- and freshwater-Mollusks are enumerated, 
and those collected by G. Doria & O. Beccari described by A. Issel ; 
they are 69 species of inoperculated and 48 of operculated terrestrial 
snails, 17 Auriculidce^ 2 Truncatella, 6 Paludinidce, 2 Ampullar Udoe., and 18 
Melaniidoe^ 7 Neritidce, 7 Cyrenidoe, 4 Unionidce^ 1 Glauconome, and 1 
Novaculina : Ann. Mus. Genov, vi. [1874] pp. 366-478, pis. iv.-vii. These 
were collected in the territory of Sarawak, the conchological fauna of 
which was formerly investigated by Metcalfe and others, and the 
Recorder’s own researches were made on the adjacent Dutch territory, 
viz., the banks of the rivers Sambas and Kapuas, so that the north- 
western quarter of this large island is now tolerably well known ; but 
the other parts, especially the south-western or the province of Banjer- 
massin, are still unknown to conchologists. 
' 5. Polynesia. 
New land-shells from New Caledonia byH. Crosse, J. de Conch, xxiii. 
pp. 136-139, pi. vi., pp. 142 & 143, pp. 216-219, pi. ix. ; new land- and 
freshwater-shells from the same island by J. B. GassieS, tom. cit. 
pp. 227-232. 
The species of Bulimus^ sect. Placostylus^ living on the Fiji Islands 
are enumerated [see below] and compared with those of the Solomon 
Islands and New Caledonia by H. Crosse, J. de Conch, xxiii. pp. 1-21. 
6. North America. 
W. G. Binney reviews the terrestrial Mollusks of North America 
from a geographical point of view. He distinguishes three distinct 
faunas : — (1) The Pacific province^ comprising a narrow strip between 
the Sierra Nevada and Cascade Mountains on the east and the Pacific 
Ocean on the west, subdivided into the Oregon region, extending north 
through British Columbia into Alaska,-and the Californian region from 
Humboldt Bay to San Diego, where the Mexican fauna begins ; the 
former has 6, the latter 41 peculiar species, 10 others are common to 
both, but peculiar to the Pacific province. (2) The Central province, 
between the Rocky Mountains on the east, and the Sierra Nevada and 
Cascade Mountains on the west, extending from Mexico to the British 
possessions; 10 peculiar species are known, it appears to be poor in 
specieSj on account of its climate and soil, and more resembles the 
eastern than the western fauna ; there is only one species of Helix, 
H. polygyrella^ which occurs here, and is unknown in th^ east. (3) 
The Eastern province, subdivided into . (a) the Northern region, from 
Chesapeak Bay, the Appalachian chain of mountains, the Canadian 
lakes, and Minnesota, to the north, including Greenland and Alaska, 
possessing chiefiy circumpolar and forest species, 32 in all, and others 
introduced from Europe, {h) The Interior region, south, of the preced- 
ing, to the alluvial regions of the Atlantic and Gulf Coasts, having 
69 species, 24 of which are peculiar to this Subdivision, 31 of them 
