48. 
LAND SHELLS. 
S.A. NAT.. 
VOL. XVIir, No. 2. 
Shell a little larger, ribs much finer, umbilicus more closed, 
mouth more open musga. 
Shell more elevated, subglobose, ribs fine (about SO) granu- 
lose, umbilicus medium, mouth practically closed 
hinsbyi. 
Shell with spire conical, ribs almost obsolete, umbilicus nearly 
closed, mouth almost continuous, edges expanded 
elder i, 
Pleuroxia cyrtopleura. 
1862. Helix cyrtopleura Pfeiffer, Journ. de Conch., Vol. X, p.227, 
pi. X, fig. 4, July 1. Near Lake Torrens, South Austr. 
Pleuroxia phillipsiana. 
1873. Helix {Angasella) phillipsiana Angas, Proc. ZooL Soc. 
(Lond.), 1873, p.l83, pi. XX, fig. 4, June. Arrowie, 
interior of South Australia. 
Pleuroxia mawsoni sp. nov. PL II, fig. 17. 
A series of shells from “the Grampus Range — 12 miles south 
of Paratoo on Broken Hill line beyond Petersburg” collected 
nearly forty years ago by (Sir) D. Mawson represent quite a 
new species. Shell subdiscoidal, top flattened, spire very little 
elevated, dead, chalky, whorls five, umbilicus narrow, deep, mouth 
with lips thin, columella only a little reflected. The apical whorls 
are granose, and this granulation develops into irregular wavy 
ribbing, which is ill defined and obsolete on the lower surface. 
It recalls eyrei in form but the sculpture differs as it does from 
the other Pleuroxia, Measurement of type: 18 mm. in breadth 
by 11 mm. in height. 
Pleuroxia polypleura. 
1899. Angasella polypleura Tate, Trans. Roy. Soc. South Austr., 
Vol. XXIII, p.246, pi. VI, fig. 2 a c, December. Bunda 
Plateau, Great Australian Bight, South Australia. 
Pleuroxia arcigerens. 
1894. Hadra arcigerens Tate, Trans. Roy. Soc. South Austr., 
Vol. Xyill, p. 193, November. Central Australia. 
1896. Angasella arcigerens Tate, Rep. Horn Sci. Exped. Cent. 
Austr., pt. II, Zook, p.l92, pi. XIX, fig. 27, February. 
Finke R. Escarpment, Central Australia. 
Pleuroxia oiigopleura. 
1894. Hadra oiigopleura Tate, Trans. Roy. Soc. South Austr., 
Vol. XVTII, p.l93, November. West Australia: Eyre’s 
Sand Patch, 160 miles west of Eucla. 
