54 HELIX-PAPUINA. 



circled by numerous chestnut bands, which are sometimes confluent 

 above and below the white peripheral girdle, giving the effect of a 

 nearly unicolored chestnut shell. Aperture very oblique, rosy or 

 lilac-white inside; peristome expanded, thickened, black; columel- 

 lar margin broad, flattened, black, its inner edge lilac colored. 



The shell is solid, strong, the apical whorl dark. The last whorl 

 has a carina at its origin, which becomes rounded on the latter part 

 of the volution. Alt. 27, diam. 34. mill. 



Ball Sound; Along Laloki or Goldie River; Mount Astrolabe, 

 Southern New Guinea. 



H. zeno BRAZIER, Proc. Linn. Soc. N. S. Wales, i, p. 107, 1876 ; 

 I c. ix, p. 805, 1884. H. latiaxis E. A. SMITH, Ann. Mag. N. H. 

 5th. Ser., xi, p. 191 ; /. c. xix, p. 420, t. 15, f. 7, 1887. 



This large species differs from H. diomedes in being less acutely 

 keeled and different in color. The specimens before me show that 

 H. (Acavus) latiaxis Smith is a synonym. They vary much in coloring, 

 and in degree of carination. Fig. 1 represents Mr. Smith's type ; 

 the other figures are drawn from specimens received from Mr. 

 Brazier. 



H. DIOMEDES Brazier. PI. 1, figs. 9, 10. 



Imperforate, trochiform, acutely keeled, solid, opaque. Surface 

 cut into minute granules by oblique and spiral striae; lusterless 

 white, with irregular radiating patches or streaks and spiral inter- 

 rupted bands of purplish-pink. Aperture very oblique, pink within, 

 the lip intensely black, thickened within, upper margin expanded, 

 basal margin flatly, broadly expanded, columellar margin broad, 

 flat, adnate to the base for about half the distance from center to 

 periphery. 



The shell is rather thin but solid. Spire straightly conical, com- 

 posed of 4| whorls, the earlier H rounded, dark purple, the follow- 

 ing flattened ; last whorl acutely keeled, rather deeply descending 

 in front. Aperture oblong-triangular, the upper lip sinuous. 



Alt, 26, diam. 32 mill. 



Constance Island, New Guinea. 



H. diomedes BRAZIER, Proc. Linn. Soc. N. S. Wales ii, p. 121, 

 1878. TAPP. CAN., Annali Mus. Civ. Genov. xix, p. 122, t. 3, f. 

 12, 1883. 



A beautiful species, intermediate in form between H. brumeriensis 

 and H. zeno, but perfectly distinct from either. It is even more 



