180 HELIX-HADRA. 



The shell is globose ; spire conoidal, apex obtuse ; suture deep ; 

 whorls 5, convex, the last descending, constricted behind the lip ; 

 aperture round-lunar, white inside ; peristome expanded all around, 

 very dark, granulate in adults; columella dilated, half concealing 

 the umbilicus ; its front edge very strongly arcuate, not straightened 

 as in H. pomum. Columella and the dark callus on the parietal 

 wall closely granulated. 



Alt. 34, greater diam. 34, lesser 30 mill. 



Liverpool River, Arnhem Land, N. Australia. 



H. Edwardsi Cox, Monog. Austr. L. Sh., p. 109, t. 19, f. 3, 1868. 

 MARTENS, Novit. Couch, iv, p. 45, 1. 118, f. 4, 5 (not H. edvardsi 

 Bland). H. (Xanthomelon) nigrilabris MARTENS, Mai. Bl. xvi, p. 

 79, 1869. CROSSE, Journ. de Conchyl. 1881, p. 20. H. Meadei 

 BRAZIER, Proc. Zool. Soc. Lond., p. 662, 1870. TATE, Trans. Proc. 

 Rep. Roy. Soc. S. Austr. v, p. 49, 1882. 



Separated from H. pomum by the fine oblique wrinkling of the 

 surface, the blackish peristome, and the concave columella. 



H. ANGASIANA Pfeiffer. PI. 38, figs. 60, 61, 62. 



Shell depressed-globose, deeply umbilicated, solid, with distinct, 

 oblique stride of growth, and showing under a lens numerous pecu- 

 liar scratches on the surface of the body-whorl, descending in a di- 

 rection at right angles to the growth-strite. Aperture round, much 

 as in Cydophorus ; lip reflexed all around. 



The shell is globose-depressed with conoidal spire. The speci- 

 mens before me are bleached, lacking epidermis and color ; but ac- 

 cording to Angas, living shells have two chestnut bands, one sub- 

 sutural, the other above the periphery. Apex flattened ; sutures 

 well impressed ; whorls 5, convex, the last somewhat descending in 

 front, rounded at the periphery. Aperture not much oblique, cir- 

 cular, the lip well expanded all around, terminations approaching, 

 connected by a parietal callus. Umbilicus deep, rather cylindrical, 

 its sides nearly perpendicular. 



Alt. 19, greater diam. 22, lesser 19 mill. 



Near Lake Torrens, S. Australia ; Darling River, N. S. Wales. 



H. angasiana PFR. Journ. de Conchyl. x, p. 228, t. 10, f. 2, 1862. 

 Cox, Mouogr. Austr. L. Sh. p. 49, t. 6, f. 4. ANGAS, P. Z. S. 

 1876, p. 267, t. 20, f. 13, 14. 



