HELIX-CHLORITIS. 265 



H. BUXTONI Brazier. Un figured. 



Shell umbilicated, depressed, thin, slightly shining, brownish 

 horn under a velvety periostraca ; faintly obliquely striated ; suture 

 distinctly impressed covered with short, minute, sharp-pointed stiff 

 hairs ; spire small, apex slightly raised, granulated ; whorls 4J, 

 convex, last large and rounded ; deflected in front, base convex 

 with a few minute scattered hairs ; umbilicus rather wide outwardly, 

 aperture diagonal, Innately rounded, peristome flesh tinged, ex- 

 panded, margins approximating, right thin, columellar margin 

 regular, finely granulated, broadly reflected, but not covering the 

 umbilicus. 



There are two distinct- varieties of this species ; one is dark brown- 

 ish horn, the other reddish-brown ; the least rubbing will remove the 

 beautiful velvety periostraca with the short minute pointed hairs 

 that gives the surface the appearance of being granulated with 

 minute lengthened grains. I wet the outer surface of one specimen 

 and removed the outer coating with the point of a penknife ; this 

 entirely alters the appearance, showing the strise at the suture and 

 umbilicus to be very much coarser, other parts being quite smooth. 

 They resemble dark varieties of Helix Delessertiana with the 

 sculpture removed. (Brazier.} 



Alt. 6, greater diam. 12, lesser 9* mill.; width of umbilicus 2 mill. 



Thursday Island, Torres Straits. 



H. (Planispira] Buxtoni BRAZIER, Proc. Linn. Soc. N. S. Wales, 

 Iv, p. 394, 1879. ' 



This may possibly belong to the group of H. tuckeri Pfr. 



H. BREVIPILA Pfeiffer. .PI. 58, figs. 28, 29, 30. 



Shell small, depressed, narrowly umbilicated, thin and fragile, 

 the periphery rounded ; light brown, under a lens seen to be densely 

 clothed with short, stiff hairs. 



The form is globose-depressed, spire convex, but low, and blunt ; 

 the sutures impressed ; whorls 4, convex, the last not at all angular 

 at the periphery, suddenly a little descending in front ; aperture 

 wider than high, transversely oval, oblique ; peristome thin, nar- 

 rowly expanded, dilated at the columella, impinging a little upon 

 umbilicus. Alt. 5, greater diam. 9i, lesser 8 mill. 



Victoria, S. Australia ; N. S. Wales; Queensland and the islands 

 in Torres Straits. 



