2l6 PETTERD : ON SOME NEW TASMANIAN HELICES. 



12. H. Trucanini, n. sp. 



Shell perforated, depressly convex, of a deep rich brown, 

 shining, obliquely striate throughout with lines of growth, 

 many of which are distantly irregularly prominent, cros'sed 

 by fine minute, spiral stride, giving the shell under the lens 

 a granular appearance ; whorls 4, convex, impressed at the 

 suture ; apex obtuse and rounded, descending very little in 

 front ; periphery rounded ; base convex, sculptured same as 

 upper surface ; perforation small and deep ; mouth Innately 

 rounded : lip thin, acute; margins distant, joined by a thin, 

 smooth, polished callus ; columellar margin dilated and almost 

 concealing the perforation. 



Diam., greatest 2^^, least 2 ; height i3^ mil. 



Habitat — Near First-basin, Launceston. Gregarious 

 among mosses in the branches and on trunks of trees ; also 

 more sparingly on rocks overgrown by moss. 



Although allied to H. fieglecia Brazier and H. Jungei-- 

 viannice mihi, it is nevertheless very distinct by its smaller 

 size, different color, and the umbilicus is small and almost 

 concealed. 



13. H. Lottah, n. sp. 



Shell openly umbilicated, depressed, discoid, translucent, 

 thin, white, scarcely shining; regularly, rather coarsely ribbed 

 throughout, interstices with extremely fine striae; spire flat; 

 suture moderately impressed; whorls 4J-, slightly convex, 

 apical {2.\) quite smooth, last rounded, not descending in 

 front; below, with striae as above, running into the somewhat 

 shallow, open umbilicus, which is flattened at the bottom; 

 aperture lunate ; peristome simple, thin. 



Diam., greatest 2^, least 2; height i mil. 

 Habitat — Cataract Hill, near Launceston, on the under 

 surface of large boulders. 



J.C, ii., Tuly, 1879 



