65 



chocolate zone about a millimetre broad, and beneath the suture, 

 which is impressed, a slightly narrower band of the same hue, 

 the intervening space being wider than either band, the spire 

 is so coiled that the suture throughout its extent divides the 

 lower band of the upper whorl from the upper band of the 

 succeeding one, lip of aperture white ; whorls four and a half, 

 gradually increasing, evenly rounded from the suture to the base, 

 last descending in an alignment with the peripheral band ; 

 aperture very oblique, oval-lunate, slightly expanded and re- 

 flected above, and much so beneath ; columella remarkable for 

 its wide and straight expansion, callus thin, transparent ; umbil- 

 icus narrow, deep, and spiral, abrupt at the margin and steep 

 within, partially overhung by the dilated columella, and slightly 

 choked by an internal swelling of the termination of the last 

 whorl. 



Dimensions. — Major diameter, 13 ram.; minor, 11-5 

 alt., 9-25 mm. ; height and length of aperture, 6-75 ram. ; 

 of umbilicus, 2-5 mm. 



This species, of which only a single specimen was obtained, 

 is the smallest member of the subgenus Iladra yet known, and 

 comes very close to one taken during the expedition to Lake 

 Eyre in the years 1874-5, of which there are two examples in the 

 South Australian Museum collection. 



Mr. Brazier on seeing the shell noted its very close resemblance 

 to //. australis, Menke, but the figure of that species as repro- 

 duced in .Dr. Cox's monograph could not be taken as a guide to 

 its identification. 



Neai- Illbillee Soakage, Everard Range 

 2,000 feet. 



nun. ; 

 diara. 



at an elevation of 



Helix (Hadra) Elderi, 



spec. 710V. 



(PI. I., figs. 2a— 2c, 4, 5.) 



Shell umbilicated, depressedly globose, thin, translucent, 

 coarsely obliquely striated, more so at the suture; yellowish-white, 

 and having two rufous bands, one, the broader, just above the peri- 

 phery, and the other at the suture, the suture being wound 

 round the centre of the lower band of the preceding whorl, and 

 the right margin of the peristome inserted at the lower edge 

 of this band ; spire elevated, obtuse at the apex. Whorls five, 

 convex, regularly increasing, the last rounded and inflated at the 

 base in the region of the lip, descending slightly in front ; aper- 

 ture oblique, roundly lunate, margins approximating, peristome 

 thin, broadly reflected, and very eff'usely dilated; columellar 

 margin narrowly expanded above, and reflected over and 

 partially concealing the umbilicus. 



Measurements. — Major diam. , 17 mm.; minor diam., 14 mm.; 

 E 



