HELIX-PAPUINA. 67 



and usually under the suture. Whorls 5, convex, separated by 

 impressed sutures ; the earlier two whorls darker, of a reddish color ; 

 last whorl a trifle descending in front, angular at the periphery, 

 convex beneath. 



Aperture oblique, transversely oval, light and having brown 

 stains within ; lip expanded, white, dilated at the columellar inser- 

 tion. Alt. 16?, greater diam. 22, lesser 18 mill. 



Eddy stone Id., Solomon Group. 



H. motacilla PFR., Monogr. iv, p. 259 ; Novit. Conch., t. 31, f. 

 12, 13. 



Differs from H. eddystonensis in lacking brown bands and in hav- 

 ing a dark apex. The lip is narrower than in eddystonensis or 

 maddocksi, and the spire rather more conoidal. All of these species, 

 eddystonensis, gelata, maddocksi, motacilla are very closely allied, and 

 should perhaps be considered as varietal forms, rather than fully 

 differentiated species. 



H. ANTRORSA Pfeiffer. Unfigured. 



Shell umbilicated, subconic, thin, striate and decussated with for- 

 ward-descending wrinkles ; pellucid, corneous-white ; spire conoid, 

 rather obtuse ; suture margined ; whorls 5, a little convex, rapidly 

 increasing, the last compressed and acutely carinated, nearly flat, 

 above, deflexed from the carina in front, the base narrowly inflated 

 around the umbilicus. Aperture very oblique, lanceolate-lunar; 

 peristorne thin, margins slightly converging, the upper lip expanded, 

 subrostrate at the outer angle, basal lip strongly arcuate, reflexed, 

 dilated above the umbilicus. 



Alt. 12, greater diam. 23, lesser 19 mill. (Pfr.) 



Haman Island, Admiralty Group. 



If. (Cymotropis) vitrea v. MART, in Die Heliceen 2d. edit., p. 169, 

 not H. vitrea Fer., vide v. Mart., Ostas. Zool. Landschn., p. 319. H. 

 antrorsa PFR., P. Z. S. 1855, p. 113 ; Monogr. iv, p. 254. 



H. SACHALENSIS Pfeiffer. Unfigured. 



Shell narrowly umbilicated, conoid, thin, striate, subdecussated 

 with forward-descending striulse; tawny-whitish, with a white 

 peripheral band, above it a narrow chestnut band, and some brown 

 ones. Spire conoid ; whorls 4, moderately convex, the last not 

 descending, carinated in the middle. Aperture oblique, rhombic- 



