63 



Of a number of living and mature shells received by me some 

 two years since some do and some do not exhibit the band. 



This species varies a great deal, not so nmch in shape as in 

 thickness, and again in coloration. The typical form is solid, 

 but by far the greater number of the shells obtained during the 

 expedition are comparatively thin, and appear to be identical 

 with a race of this species which has extended southwards from 

 the MacDonnell Ranges, and of which we have examples col- 

 lected at Wilson and Carrieton. At one locality a dwarf form 

 was taken very much in size and shape like llelix Flindersi, 

 Adams and Angas, but without the colour-bands of that species. 

 In coloration the shell varies considerably ; some are a creamy- 

 white, others have a faint interrupted cloudy -reddish band just 

 above the periphery ; in others this band becomes a most dis- 

 tinctive marking, wliile in very many the band extends from the 

 periphery to the suture, being darkest in the centre. In the 

 dwarf exanaples the shell is of a uniform greenish hue, with a 

 shining vitreous appearance. 



A description of the animal of H. perinfiata from IMacDonnell 

 liange — specimens supplied by me, is given by Mr. Hedley in 

 Proc. Roy. Soc, Queensland, vol. 6, p. 250, 1889. 



The species was taken at the following localities : — 



At the Everard Range on gneissic rock, at an elevation of 

 1,800 feet. 



Mount Illbillee Soakage, Everard Range, under fig-trees, at an 

 elevation of 2,000 feet. It was here that the dwarf specimens 

 with the vitreous appearance were taken in company with one of 

 the normal form. 



Near Camp 4. Amongst spinifex, on sandy soil with lime 

 outcrop. 



Twenty miles south-east of Camp 4. Under spinifex. 



l^etween Everard and Birksgate Ranges. 



Near Camp 8. Under tig-trees, on granite rock. 



Near Camp 10. In debris, under fig-trees, on granite rock. 



Camp 14. Under granite rocks. 



Birksgate Range. Amongst granite boulders under fig-trees. 



Skirmish Hill. One dead specimen. On porphyrytic i-ock. 



Cavenagh Range. 



Near large clay-pan. About three miles south of Camp 58, 

 Victoria Desert. 



Between Fraser Range and Yilgarn Goldfield. 



Helix (Hadra) fodinalis, Tate. 

 (PL I, figs, la— Ic.) 

 Shell moderately umbilioated, globosely conic, ratlier- thin and 

 somewhat glossy ; surface coarsely- and closely-wrinkled trans- 



