MOLLUSCA. 
By RALPH TA TE^ Professor of Natural History in the University 
of Adelaide. 
With an A2)i3endix on Anatomical Characters by C. Hedlet, F.L.S., Assistant in 
Zoology to the Australian Museum, Sydney. 
(Plates 17, IS, 19). 
CONTENTS. 
Chapter I.— Land Mollusca. 
1. —Previous Eecords and Introdiictory Remarks. 
2. —Affinities and Geographic Relationshijjs. 
3. —Descriptive List of Species. 
Chapter II.— Fluviatile Mollusca. 
1. —Previous Records. 
2. —List of Species and Remarks on their Distribution. 
Chapter I.— Land Mollusca. 
1. Previous Records and Introductory Remarks. 
Prior to the advent of the Horn Expedition, the published information 
respecting the land-mollusca of the region investigated by the Expedition was 
restricted to three species. 
Waterhouse, the naturalist to Stuart’s Transcontinental Expedition, gathered 
specimens of a snail in the McDonnell Range which Pfeiffer described, P.Z.S., 
1863, as Helix perinflata ; a second species seems to have been collected 
(“Features of Country on Stuart’s Track,” Pari. Rep., 1862, p. 8), but has hitherto 
escaped determination. The Rev. Mr. Kempe communicated to the writer 
examples of three species of land snails, two of which are referred to in Trans. 
Roy. Soc. S. Aust., vol. iv., p. 140, 1882, viz.. Helix cyrtopleura (non. Pfr.), herein 
