2 1 2 PETTERD : ON SOME NEW TASMANIAN HELICES. 



above and descending into the deep open, perspective umbi- 

 licus ; aperture lunate, margins approximating, columellar 

 margin neither dilated nor reflected. 



Diam., greatest 2, least i}( ; height i mil. 



Habitat — First-basin near Launceston, among mosses on 

 the branches and trunks of trees. 



A prettily marked flat species of very constant and 

 distinct character. In form it resembles H. Belli Cox, from 

 New South Wales. 



5. H. Spiceri, n. sp. 



Shell perforate, turbinately-globose, thin, yellow-brown, 

 shining \ above obliquely striate and conspicuously decussate, 

 base of body whorl almost smooth and much more shining 

 than upper surface ; whorls 5, convex, gradually increasing 

 in size ; spire obtusely conical, last slightly angled, not 

 descending in front ; aperture irregularly lunate ; peristome 

 thin, margins distant, joined by a thin but distinct callus ; 

 columellar margin slightly expanded. 



Diam., greatest i^; height 1)4^ mil. 



Habitat — South Tasmania. 



I am not quite certain as to the exact locality where this 

 minute but very distinct form was collected. It has a general 

 resemblance to H. parvissima Cox, but that species is smooth; 

 it cannot therefore be mistaken for that nor in fact any other 

 described species. 



6. H. Wynyardensis, n. sp. 



Shell with a narrow but deep umbilicus, convexly 

 depressed, rather thick, reddish-brown above and yellowish- 

 white beneath, dull, covered with a thin epidermis ; striated 

 with prominent rounded riblets above and below, the 

 interstices with much finer stris and decussate ; spire small, 

 only very slightly elevated; whorls 5^, moderately convex, 



J. C, ii., July, 1879 



