PETTERD : ON THREE NEW HELICES. 355 



DESCRIPTIONS OF THREE NEW HELICES FROM 

 AUSTRALIA. 



By W. F. PETTERD. 



1. Helix Fernshawensis, n. sp. 



Shell perforated, convexly depressed, dull brown, very 

 irregularly, prominently streaked with lines of growth ; 

 whorls 4)^, spire small, convex, apex smooth, blunt, some- 

 what corroded, suture well marked ; last inflated, not 

 descending in front, periphery rounded ; base convex, 

 marked same as upper surface \ aperture very large. Innately 

 rounded, margin distant, columellar margin suddenly ex- 

 panded, entirely covering the perforation, peristome simple. 



Diameter, greatest 6)^, least 5 ; height 3;^, mill. 



Habitat — Fernshaw, Victoria. 



A very distinct species, allied to H. radians Pfr. said 

 to be from Port Jackson, New South Wales, and more 

 closely to H. Vitrinczformis Cox, from Tasmania. I am 

 indebted for this and the other species now described to the 

 kindness of my friend, Mr. W. Kershaw. 



2. Helix Dandenongensis, n. sp. 



Shell widely unbilicated, flatly discoid, pale blueish- 

 white, prominently, closely, regularly ribbed, interstices 

 decussate ; spire flat, suture very much impressed ; whorls 

 5^, regularly increasing, convex, apex smooth, last slightly 

 flattened above, periphery rounded; base convex, sculptured 

 as above, running into the umbilicus, which is very large, 

 shallow, freely exposing the whorls and flat at the bottom ; 

 aperture lunate, margins distant, peristome simple, columellar 

 margin very faintly expanded. 



Diam., greatest 5, least 4; height i^ mill. 



Habitat — Dandenong Range, Victoria. 



Somewhat plentiful. The nearest species that I am 



