HELIX-HADRA. 179 



This species is peculiar to Arnhem Land, though closely allied 

 to H. pachystyla which ranges along the whole of the coast of North- 

 east Australia. It was first obtained by MacGillivray at Port Es- 

 sington, and has since been collected in the Port Darwin district. 

 Prof. Ralph Tate found it widely but sparsely distributed over the 

 country from Palmerston southwards to Pine Creek. It was only in 

 the jungles near the coast that it seemed to be at all plentiful. 



H. pomum is umbilicated and has the outer lip expanded, whilst 

 its ally from Queensland, If. pachystyla, is imperforate and its outer 

 lip is blunt, slightly thickened within but not expanded. The 

 Queensland shell has also obvious spiral striae, not shown in the H. 

 pomum. The name pseudomeadii was proposed for specimens hav- 

 ing the columella and parietal wall distinctly granulated. One of 

 the specimens before me is so sculptured. 



H. BANNERI Macgillivray. PL 38, figs. 57, 58. 



Shell umbilicated, turbinately-globose, rather thin, obliquely ir- 

 regularly striated and very thickly pustulated, reddish-yellow, with a 

 yellowish band near the suture ; spire shortly turbinated, apex rather 

 acute; whorls 4A, convex, the last ventricose, deeply descending in 

 front ; columellar slightly arched, sinuous ; aperture almost diagonal, 

 Innately rounded, somewhat pearly within ; peristome thin, shortly 

 expanded, scarcely reflected, margins converging, joined by a thin 

 callus ; columellar margin extremely dilated, reflexed in a vaulted 

 manner, adherent, adnate. (Pfr.) 



Alt. 31, greater diam. 41, lesser 33 mill. 



Cape Direction, Queensland. 



H. banneri MACGILLIVRAY in Pfr., P. Z. S. 1862, p. 270 ; Mono- 

 graphia Hel. Viv. v, p. 280 ; Novit. Conch, p. 213, t. 56, f. 10, 11. 

 Cox, Mon. Austr. L. Sh. p. 6. 



A species not found as yet by Australian writers. Should be 

 compared with pomum and pachystyla. 



H. NIGRILABRIS Martens. PI. 38, figs. 70, 71. 



Shell globular, umbilicated, yellow, with a broad chestnut-brown 

 band above, extending from suture nearly to periphery ; surface 

 covered with a dense fine wrinkling, in a direction at right angles to 

 the growth-stride; aperture white within, the lip expanded ; lip, col- 

 umella and parietal wall finely granulate, and of a deep chestnut 

 color. 



