S.A. NIT.. 
\()[,. W in. Nn. 2 
ih 'fOM lUKDALK. 
53 . 
Shell Still more llaUencd and broader, periphery acutely 
keeled, sculpture more pronounced, umbilicus wider, 
base much less rounded pecu?iiosa. 
Shell similar in shape to last but with strong granular sculp- 
ture, no radials, umbilicus narrow, mouth descend- 
ing, free asperrima. 
Shell with spire flattened, with anteperipheral groove, base 
more rounded, strong wavy sculpture, umbilicus 
narrow, almost hidden euglypta. 
Shell with spire flattened, anteperipheral groove, base round- 
ed, periphery subkeeled, strong wavv sculpture, 
mouth small, lips thin, columella scarcely reflected, 
umbilicus medium, deep, bordaensis. 
Glypterhagada clydonigera. 
1894. Hadra clydonigera Tate, ’i'rans. Roy. Soc. South Austr., 
\'ol. X\'ni, p.l93, November. Central Australia. 
1896. Thersites (Glyptorliagada) clydonigera Tate, Rep. Horn 
Sci. Exped. Cent. Austr., pt. II, Zook, p.l95, pi. XIX, 
fig. 24, February. AlacDonnell Ranges, Central Aus- 
tralia (Rev. II. Kempe). 
Glyptorhagada herberti sp. nov. PI. II. fig. 19. 
I90.C Xanthomelon clydonigerum Hedlcy, Trans. Roy. Soc. 
South Austr., VoL XXIX, p.l62, pi. XXX, figs. 10, II, 
12, December. Musgravc Ranges, Central Australia. 
Medley fullv described and figured this species as he recog- 
nised it did not agree accurately with Tate’s clydonigera, but 
took refuge in the abnormality of Tate’s type. Nevertheless he 
pointed out it was also larger, more finely sculptured and less 
elevated. 'Phis shell is not unlike tv]')ical silveri, but it recalls 
the smaller members c4 Plenroxia, such as rlderi, and the form 
(4 the columella has prejudiced the separation of these, the tex- 
ture of the shell indicating the justice of this action. 
Glyptorhagada silver!. PI. II, fig. 21. 
1868. Helix {Rhagada) silveri Angas, Proc. Zool. Soc. (LoiuL), 
1868, p.257, text fig. September \S. Eastern Plains, 
South Australia (S. W. Silver). 
'Hie typical silveri is elevated, but there are specimens 
mere!} labelled “Eastern Idains," which arc much more elevated 
with a narrower umbilicus, and also varying strengths of sculp- 
ture. Local collecting must determine the value and reason of 
such variations. A paratype of silveri in the Australian Museum 
measures 20 mm. in diameter b)- 14 mm. In height, and a series 
l’'om X.E. of Petersburg confirm this, a shell measuring 22 mm. 
m breadth and PS mm. in height, the series being uniform. 
