HELIX-HADRA. 139 



H. EXOCARPI Cox. PL 40, figs. 100, 101. 



Shell umbilicated, depressedly orbicular, nearly discoid, solid, 

 obscurely, irregularly and sometimes coarsely striated, everywhere 

 finely granulated, not shining, pale yellowish-brown, spire low, 

 widely-convexly-conical ; whorls 5, very gradually increasing, flatly 

 convex, last bluntly angular at the periphery, roundly convex below, 

 descending in front ; base paler and smoother, and less finely gran- 

 ulated -than above ; aperture diagonal, Innately rounded ; peristome 

 simple, regular, slightly expanded, margins approximating, col- 

 umellar margin triangularly dilated above, and reflected, partially 

 covering the moderately sized umbilicus. ( Cox.) 



Alt. 0*35, greater diam. 0*70, lesser 0*65 inch. 



Cherry Tree Hill ; Mudyee and Ryalstone, N. S. Wales, Australia. 



H. exocarpi Cox Monogr. Austr. L. Sh., p. 44, t. 2, f. 2. 



H. LEUCOCHEILIIS Cox. PI. 40, figs. 10, 11, 12. 



Shell small, depressed, umbilicated, the spire low-conoidal, 

 periphery keeled ; thin and rather translucent, of a pale brown 

 color, with a light chestnut girdle around the umbilicus, and gener- 

 ally another above the carina and at the suture also ; aperture 

 much wider than high ; lip thin, expanded all around ; surface all 

 over densely microscopically granulated. 



The form is depressed, thick lens-shaped; spire low, composed of 

 nearly 5 whorls, which are not very convex, separated by evenly, 

 distinctly impressed sutures. Last whorl distinctly carinated, 

 slightly, rather abruptly descending in front, a little constricted 

 behind the narrowly reflexed white lip. Aperture brown within ; 

 columella triangularly dilated partly over the deep umbilicus. The 

 base is as distinctly granulated as the upper surface. 



Alt. 6i greater diam. 12, lesser 10^ mill. 



Clarence and Richmond Rivers, N. S. Wales ; Brisbane, Queens- 

 land, Australia. 



H. marice Cox P. Z. S. 1864, p. 593 (preoc.). H. leucocheilus Cox, 

 Monogr. Austr. L. Sh., p. 54, t. 8, f. 7, 7a, 7b. TRYON (as Trichia) 

 Manual, iii, p. 183. 



A small carinated species, densely granulate above and below, 

 pale brownish-horn color, with pallid brown girdles at umbilicus, 

 periphery and suture, the first more constant than the others. 



