40. 
LAND '^BELIS. 
^A. NAT.. 
VOL. XVIII. No. 2. 
Family Xanthomelontidae. 
Hedley dissected some of these Centralian snails, and found 
that by means of the generative organs he could separate two 
large series, the one including the T her sites ^ Chloritis, Papuina 
and Planispira series as contrasted with X anthoinelon in which 
he included the globose forms I have called Simunelon, and also 
Angasella and Glyptorhagada, However he distinguished some 
of the similarly formed shells as covering “Thersitoid” animals, 
e.g. setigera. The latter recall the Planispira series conchologic- 
allv as well as the Chloritid one, so have been allotted to the 
previous family, but these allocations must be regarded as tent- 
ative. 
Key to Genera. 
Shell globose, sometimes a little flattened, umbilicus narrow 
or even closed, sculpture indefinite plicae. 
Sinumelon. 
Shell with spire elevated, subglobose, mouth circular^ prac- 
tically free, sculpture strongly granose. 
Granulomelon. 
Shell flattened, umbilicate, mouth oblique, sculpture strong 
radial ribbing, umbilicus typically wide 
Pleuroxia, 
Shell elevated, spire straight-sided, very narrowly umbilicate, 
mouth circular, almost free, edges flaring, columella 
triangularly reflected, sculpture granulose 
Basedozvena. 
Shell flattened or elevated, narrowly umbilicate, but some- 
times widely comparatively, sculpture even stronger 
radially ribbing than Pleuroxia^ but sometimes 
granulose Glyptorhagada. 
Shell very flattened, strongly keeled, many whorled, with 
minute umbilicus and thickened lips, mouth rather 
oblique D^vellomelon. 
Genus Sinumelon. 
3930. Sinumelon Iredale, Viet. Naturalist, Vol. XLVII, p.l20, 
November. 
Haplotype Helix nuUarborica Tate. 
1932. Notobadistes Cotton and Godfrey, South Austr. Naturalist, 
Vol. XIII, pp. 169-170, “August”=September 30, 
Orthotype Helix bitaeniata Cox— flindersi Angas. 
Small to medium-sized globose shells with indefinite sculpture, 
and generally small umbilicus, more or less hidden by the re- 
flected columella, the outer lip also reflected. The apical whorls 
