HELICARION. 171 



H. TENELLUS, Gould. PL 38, figs. 59, 60. 



Subperforate, depressed semi globose, with conspicuous growth- 

 lines, yellowish white ; whorls 3, the last rounded at the 

 periphery, suture well-impressed ; aperture subcircular. 



Diam. 8, alt. 5*5 mill. 



Sandwich Islands. 



Said to resemble Vitrina pellucida, and probably a true 

 Vitrina. 



H. CAPERATUS, Gould. PI. 38, figs. 61-63. 



Helicoid, depressed, narrowly perforate, periphery obtusely 

 angulated, thin, subtranslucent, closely striate, with slight spiral 

 impressed lines, and obscure malleations ; yellowish corneous ; 

 whorls 3^, convex, with well- impressed suture ; aperture sub- 

 circular, lip everted at the umbilicus. Diam. 12, alt. 6 mill. 



Sandwich Islands. 

 Helix Newcombi, Pfr., is a synonym. 



H. PLANOSPIRUS, Pfr. PI. 38, figs. 64-66. 



Imperforate, oval, thin, striulate, pellucid, shining, greenish 

 corneous, flattened above, convex below ; whorls 3, very rapidly 

 enlarging ; base membraneous-submargined. 



Diam. 13, alt. 7 mill. 



Solomon's Is. 



H. ZEBRA, Le Guillou. (Unfigured.) Ins. Aukland. 



H. BRAZIERI, Cox. (Unfigured.) Fitzroy Island, Australia. 



Species included by Pfeiffer in Vitrina. 



H. MAcGiLLiVRAYi, Cox. PI. 39, figs. 67, 68. 



Much depressed, ear-shaped, thin, translucent, polished, 

 lightly striated, with a few very slight impressed spiral lines ; 

 whorls 3, the last large, flattened ; columellar margin flattened. 



Diam. 20, alt. 6'5 mill. 



New South Wales. 



The animal when disturbed exudes a purple secretion. First 

 described under the name of V. planilabris, preoccupied. 



