436 BULLID^E. 



mud in deep water on the Scandinavian coast (Loven 

 and M' Andrew) . 



It makes a shallow hole or burrow in the sand, and 

 is rather sluggish. Forbes and Hanley say that, when 

 handled, it gives out a milky fluid tinged with purple. 

 My largest specimen is not quite an inch in length. 

 Very juvenile conchologists call these shells "barrels." 



This is the Turbo ovalis of Da Costa, Auricula bifas- 

 ciata of Martini, and Speo bifasciatus of Eisso (his S. 

 tornatilis being fossil and apparently a different species); 

 the young is Tornatella pusilla of Forbes, T. pellucida of 

 Macgillivray, and possibly T. puncto -striata of Professor 

 C. B. Adams from Massachusetts ; the fry is T. globu- 

 laris of Forbes. 



Voluta heteroclita of Montagu, said to be from Dun- 

 bar, is one of Laskey's more than suspicious discoveries ; 

 it is described as having a reversed spire and being a 

 quarter of an inch long. Forbes and Hanley refer this, 

 with doubt, to the present genus. It may be a young 

 exotic land shell, of the Achatina family. 



Genus V. BULLA*, Klein. PI. VIII. f. 5. 



Body gelatinous or fleshy, not containable within the shell : 

 mantle thickened at its edges, and folded behind : head snout- 

 shaped : tentacles more or less distinct, but forming a continua- 

 tion of the head : eyes not perceptible in every species ; when 

 present they are placed at the base of the tentacular disk : foot 

 very large, expanded on each side in the shape of broad lobes 

 or flaps, which serve as fins for swimming, and cover part of 

 the shell and of the upperside of the body : gizzard composed 

 of 3 horny equal- sized oval plates. 



Shell oval : spire involute, usually concealed : mouth ex- 

 tending the whole length of the shell : pillar sometimes fur- 

 nished with a fold or plait : operculum none. 



* A bubble. 



