A Review of the Land Mollusca of Western Australia. 
5 
It is my great hope that this account will arouse someone in Western 
Australia to study their own mollusean fauna, which suggests more problems 
than almost any other in the world. Prior to Smith in 1894 some thirty-five 
species had been recorded: in his essay Smith added eighteen, that is half as 
many again. Hedley listed the fauna in 1916 as eighty, that is almost exactly 
half as many again. This list has increased the number in a similar propor- 
tion, and yet I conclude that the number on record is only a small proportion 
of the molluscs living. A rejiresentative collection will be made available at 
the Perth Museum for students, and I will be only too pleased to assist any 
such in any way that I possibly can. 
PHYLUM MOLLUSCA. 
Class GASTROPODA. 
Subclass PROSOBRANGHIA. 
Order PECTINIBRANCHIA. 
FAMILY HELICINIDAE. 
Small conical operculates, solid, spire short, whorls flattened, periphery 
subkeeled, umbilical area covered by a callus ]iad. 
Genus PLEUEOPOMA Molleiulorff 1893. 
1893 — Pleuropoma Mollendorff, Ber. Senekenb. Nat. Ges. Frankfiirt, 1893, 
p. 140, July. Orthotype TTeUrina dicliroa Mollendorff. 
1905 — Aphanoconia Wagner, Denksch. K. Akad. Wis.sen. Wien, Jlath. Nat. 
Class., Vol. LXXVIL, )). 388. Logotype Iredale, Austr. ZooL, 
Vol. VIIL, ]i. 291, 1937, Heli'^ina rerecunda Gould. 
1905 — ReticMlata, Sculpta, Dichroa id ib., sectional names only with Tauto- 
types. 
1909 — Albooinctft Wagner, Ryst. Conch. Cab. (Mart. & Chemn. ), ed. Kuster, 
Bd. 1., Abth. 18, heft ccxxv., lief 53.5, p. 1G9. Tautotype Helicina 
alhocincta Hombron & Jacquinot. 
1909 — Sphaeroconia id. ib., heft ccxxviii., lief 538, p. 189. Logotyire Iredale, 
Austr. Zook, Vol. VIIT., p. 292, 19.37, Helicina sphaeroconus M61- 
lendorff. 
Pleuropoma walkeri Smith 1894. 
Plate I., fig. I. 
1894 — Helicina walJceri Smith, Proc. Malac. Soc. (Loud.), Yol. I., p. 99, pL 
YIL, fig. 26, June. Queen’s, Baudin and Parry Islands, North- 
West Australia. 
1909 — Aphanoconia {Spli.acroconia) bandinensis Wagner, Syst. Conch. Cab, 
(Hart. & Chemn.), ed. Ku.ster, Bd. I., jVblli. XVIII., p. 217, pi. 43, 
figs. 11-13, as of Smith errore, new name for wallceri Smith. Baudin 
Island, N.W.A. 
Shell small, depressedly conical, spire short, whorls llattened, last 
whorl subkeeled, mouth lunate, outer li]i slightly thickened, umbilical area 
covered by a callus which extends across to outer lip. Coloration fawnish 
with a whitish peripheral band, and sometimes a paler base, some shells uni- 
color fawn. Apical whorl smooth, adult ivhorls three and one half, dull, 
with faint growth .striae but no spiral striation. The umbilical pad is 
