6+ 



versely, somewhat closely iind finely incised-striate in a spiral 

 direction. 



Whorls four and a half, regularly convex, separated hy a linear 

 suture ; first two and a half whorls almost smooth, but minutely 

 granulated and obsoletely wrinkled ; the granulations disappear, 

 and the wrinkles increase in strength and closeness with the 

 revolution of the spire. 



Last whorl soinewliat inflated, slightly descending in front, 

 base convex to the umbilical margin. Umbilicus moderately 

 wide with precipitous sides, and towards the inner lip subangu- 

 lated. 



Aperture ob]i(|ue, subcircular ; peristome subacute, slightly- 

 reflected, margins not joined by a callus. Columella-margiu 

 dilated above and slightly extending over the umbilicus. 



Colour, a pale-brown above, paler beneath, sometimes with a 

 nari'ow reddish-brown infuscation in front of the suture. 



Animal : — Foot of a chestnut colour with grey rugosities, broad 

 and short behind ; eye-pedicels of a blackish and tentacles of a 

 chesnut colour ; collar milk-white. 



Dimensions: — Major and minor diameters, 18 mm. and 15 

 mm.; altitude, 14:'25 mm,; height of aperture, 10 mm.; length of 

 aperture, 9 mm.; diameters of umbilicus, 3 and 3-5 (vix.) mm. 



Affinities and Differences : — The nearest ally of this species is 

 //. Nullarhorica, mihi, from which it differs in the absence of an 

 impressed suture , finer and closer spiral striaj, larg<}r umbilicus, 

 as well as by coloration and thinness of test ; it is related ti > 

 II. Angasiana, Pfeifi'er, but has more regularly convex wliorls, 

 coarser growth-lines, less-rotund and not so descending aperture, 

 less thickened and reflected peristome. //. hitaeniata, Cox, is a 

 more distant alliance, from which it differs mainly by its less- 

 elevated spire and large umbilicus. 



Habitat. — Taken alive in considerable numbers in March, 1876, 

 beneath blocks of stones on tlie outcrop of the auriferous reef at 

 Waukaringa, S. Australia. — B. Tate. 



Between Victoria Spring and Fraser Range. (,)ne dead 

 specimen. 



Helix (Hadka) Eveuaudensis, spec. nov. 

 (PL I., figs. 3a— ;3c.) 

 Shell umbilicated, globosely conical, somewhat thin, translucent ; 

 lower whorls closely ribbed by stout irregular and oblique flat- 

 topped costie, which are coarsest behind the aperture, and gradu- 

 ally fade away on the upper whorls into fine stria; ; under the 

 lens irregularly pitted thi-oughout ; epidermis, pale yellow, 

 much abraded, exposing in places the chalky-white of the shell 

 substance ; encircled immediately above the periphery by a 



