HELICARION. 171 



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



Subperforate, depressed semiglobose, 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 

 Yitrina. 



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, stfiulate, pellucid, shining, greenish 

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

 enlarging ; base membraneous-submargined. 



Diam. 13, alt. 7 mill. 



Solomon 1 s Is. 



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



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



Species included by Pfeiffer in Vitrina. 



H. MAoGiLLiVRAYi, 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. 



