fe.A. NAT.. 
VOL. XVIII, No. 2. 
By TOM IREDALE. 
25 . 
Elsothera reteporoides. 
1887. Helix reteporoides Tate, Trans. Roy. Soc. South Austr., 
Vol. IX, 1886, p.62, pi. \', ff. 14a-c, March (separates 
distributed Dec. 29 1886). Black Hill near Adelaide, 
S.A. 
Genus Discocharopa. 
1913. Discocharopa Iredale, Proc, Mai. Soc. (Lond.), Vol. X, 
p.379, Sept. 
Orthotype Charopa exquisita Iredale. 
This Kermadec type was found living under stones rather 
deeply imbedded and under somewhat dry conditions. The 
Tasmanian bassi has been reported from similar situation, and 
conchologically it very closely agrees, while the Central planorb- 
idina appears to come into this group. 
Shell very small^ flattened, discoidal, apex smooth, sculpture 
fine radials, umbilicus very wide, mouth without internal lamellae 
of any kind. 
Discocharopa planorbulina. PI. I, fig. 21. 
1896. Endodonta {Charopa) planorbulina Tate, Rep. Horn Sci. 
Exped. Centr. Austr., pt. II, Zook, p.l87, pi. XVIII, 
fig. 3, February, Palm Creek, Krichauff Range, Central 
Australia. 
Genus Roblineila. 
1937. Rohlinella Iredale, Austr. ZooL, Vol. VIII, p.332, Mch. 12. 
Orthotype Helix roblini Petterd. 
This group was separated on account of its large protoconch, 
beautifully spirally striate: otherwise the shell resembles Disco- 
charopa in conchological features. Indeed the species here re- 
corded was referred to that genus until examined microscopically. 
Roblineila speranda sp. nov. PI. I, fig. 18. 
Shell discoidal, spire flattened, last whorl scarcely descending, 
umbilicus very wide, lips thin, no teeth in aperture. Color cream! 
Apex of two whorls, ending in a varix, concentrically boldly 
striate, succeeding sculpture fine regular closely set radial ribs, 
about one hundred and eighty on the last whorl, the interstices 
finely striate. The type, from Adelaide, measures, major diameter 
2 mm., height 1 mm. 
Genus Pillomena. 
1933. Pillomena Iredale, Rec. Austr. Mus. Vol. XIX p.S4 
Aug. 2. 
Orthotype Hammulina meraca Cox & Hedley. 
This genus was proposed for a series of Charopid molluscs, 
with convex spire, although almost discoid, narrow umbilicus. 
