252 



present the appearance of two undulated lines intersecting 

 each other. i...i Aberdeen. 



BULLA CANDIDA. Macg. Ab.p. 189. DIAPHANA 

 C. Brown III. Con. t. 38. /. 13, 4. Broadly ovate, 

 thin, semitransparent, glossy white ; apex rather pro- 

 minent, obtuse, two very small volutions being apparent, 

 but with a slight scrobiculus ; aperture wide, ovate- 

 oblong, acute behind, the columellar margin a little 

 thickened and reflexed, outer margin thin. Aberdeen 



~&.}?\]wwsi\ Johnston in Edin. Phil.J. 19. Oblong- 

 oval, opaque, white, thickish, marked with numerous 

 close, transverse, punctured striae ; apex with a very 

 narrow perforation 0,33. Berwick. Shape of B. 

 Ampulla of Mont ague. 



B. MINUTA. Macg. Aber.p. 334. DIAPHANA M, 

 Brown. III. Con. t. 38./. 7, 8. Ovate cylindrical, of 

 two very thin transparent hyaline white glossy 

 turns, nearly smooth ; broadly truncate above, with a 

 wide sutural groove, and a rounded mammillation which 

 protudes a little; mouth oblong, anteriorly wide and 

 rounded, moderately narrowed behind, extending the 

 whole length of the shell : outer lip projecting conside- 



