284 DIAPHANA. 



pi. 19, f. 13, 14. Diaphana Candida BROWN, Conch. Text Book, 

 p. 98, pi. 14, f. 30. 



This species has generally been known by the preoccupied name 

 B. hyalina Turton, which is, besides, later than the names given by 

 Brown. 



D. EXPANSA Jeffreys. PI. 26, fig. 69. 



Shell very thin, hyaline, irregularly ovate, quite ventricose, the 

 width nearly equal to the alt. ; base obliquely expanded ; vertex nar- 

 row, truncate, spirally involute ; whorls 3-4, the penultimate 

 slightly projecting. Aperture narrow above and removed from the 

 vertex, very much expanded below ; outer lip narrowly rounded at 

 the superior angle, then slightly inflexed, beneath obliquely arcuate ; 

 columella nearly straight ; umbilicus narrow but distinct. 



Alt. 6 mill. 



Shetland Is. ; Norway ; Bay of Biscay ; Palermo. 



Amphisphyra expansa JEFFR., Rep. Brit. Asso. 1864, p. 330. 

 MONTS., Journ. de Conch. 1874, p. 280. Utricnlusexpansus JEFFR,., 

 Brit. Conch, iv, p. 426 ; v, pi. 94, f. 6 ; Ann. Mag. N. H. (6), vi, p. 

 318.? Bulla globosa CANTRAINE, Mai. Med. et Lit. p. 82, (ex. 

 Mem. Acad. Roy. Bruxelles, xiii). Diaphana expansa SARS, Moll. 

 Reg. Arct. Norv., p. 289, pi. 18, f. 2a (shell), 2b (animal) and pl.xi, 

 f. 11 (dentition). 



Shell more inflated, less angular in the middle than D. minuta, 

 with a larger umbilicus. The animal lacks eyes, and the foot is'nar- 

 rower and longer than in D. globosa. 

 D. QU ADR ATA Monterosato. Unfigured. 



Small, wider than high, very fragile, transparent and without 

 any sort of sculpture; spire truncated, composed of 3 convex 

 whorls, angular at the lower part, and separated by an excavated 

 suture. Aperture nearly squared, the outer margin detached at 

 the insertion as in the genus Akera; columella perpendicular, um- 

 bilicus profound. 



Off Cape St. Vito, and Palermo, Sicily, in deep water. 



Amphisphyra qnadrata MONTS., Journ. de Conchyl., 1874, p. 

 280. 



D. VENTRICOSA Jeffreys. PI. 59, figs. 29, 30, 31. 



Shell globosely ear-shaped (not like a Vehitinci), nearly trans- 

 parent, glossy and slightly prismatic; sculpture, numerous fine, 



