208 
HORN EXPEDITION—MOLLUSCA. 
Chapter IT.— The FreSh-water Mollusca. 
Thirteen species of fresh-water shells were gathered by me, of which only one, 
Melania halonnetisis, had previously been recorded from the region (Trans. Roy. 
Soc. S. Aust., vol. iv., p. 140). Seven are additions to the faunula of extra-tropical 
South Australia. The species of the Larapintine I’egion belong for the most part to 
Queensland aud the Northern Territory. It is noteworthy that Unio stuarti does 
not occur in the Finke River basin ; its most northern station in South Australia 
is the River Coglin, as at Charlotte Waters, but it reappears at Newcastle Waters 
in the Northern Territory. The species are 
*Planorbis fnagilis, Brazier. 
* Melania venustnla, Brot. - Anejlns a?^slralicns, Tate. 
Melania balonnensis, Conrad. 
*Bithinia australis^ Tryon. 
^Linineea vinosa, Ad. and Angas. -- Corhicula leeviga/a, Smith.- 
Bulimis texturatus, Sow. - Sphceriuni translncidinn, Sow. 
*Bulimis dispar, Sow. 
Bnlinus pectorosus, Conrad. -- Unio stuarti. Ad. and Angas. 
Isidorella newconibi, Ad. and Ang. 
Isidorella newcondd, var. inplata. 
Isidorella netvconibi, var. brazieri. 
Family MELANiADiE. 
Melania venustula, Brot. 
References.- —Brot, in Martini and Chemnitz Conch. Cabinet, p. 3.11, t. 34, 
figs. 5, oa, 1874; id., Tate and Brazier, Proc. Lin. Soc., N.S. Wales, vol. vi., p. 560, 
1881; id.. Smith, Proc. Lin. Soc., vol. xvi., p. 260, t. 4, figs. 9, 10, 1882. 
Locality shells in the bed of the River Finke, at Crown Point. 
Exoteric distribution. In addition to Port Denison, the locality of the type, 
Mr. Brazier records it from Cape Upstart, in the same province of Queensland, 
and Mr. E. A. Smith reports it from the Victoria River, North-west Australia, 
on a specimen in Brit. Mus. collected by the Gregory Expedition. The Finke 
River specimens are much more elongated than the Cape Upstart specimens 
received from IMr. Brazier, or that hgured by Brot, but agree with the form from 
Victoria River figured by IMr. E. A. Smith. 
* Species new for extra-tropical Soiitli Austraiia. 
