MARGINELLIN^. 



323 



strong grooves, which form a little tooth 

 at the edge of the outer lip ; inner lip 

 wanting ; base of the pillar thick, vitreous, 

 obliquely striated, and turned outwards. 



Ancillabia Lam. The characters, at 

 present, are those of the sub-family, as 

 the genera have not been worked out. 

 A. glabrata Sw. {fig. 88.) 



SuB-FAM. 5. MARGINELLINiE. 



Shell small; oval; spire short or concealed; outer lip, 

 and often the inner, very much thickened and inflexed, 

 with the inner margin tcrenated ; pillar with distinct 

 plaits ; the base with a wide, but not a deeply cleft 

 notch. 



VoLUTELLA Sw. Bulliform ; ovate oblong ; 

 spire either entirely or almost concealed ; 

 pillar with four oblique plaits at the 

 base ; aperture not striated ; outer lip 

 smooth, thickened; inner lip wanting. 



{fig- 89.) 



V. bullata. Chemn. 150. f. 1409-10. 

 oblonga. Zool. 111. ii. pi. 44. f. 1 

 guttata. lb. f. 2. 



Persicola Schum. General form of Volutelta ; 

 the spire always concealed ; plaitsnumerous, 

 and extending nearly over the whole of the 

 pillar; the aperture striated; inner lip thick 

 ened, spreading. 



avellana. En. M. 377. f. 5. lineata. En.M. 377. 

 maculata Sw. lb. f. 3. f. 4. (fig. 90.) 



Gibber UL A (Sw. Sub-oval; spire slightly prominent ; 

 top of the outer lip dilated and gibbous ; base of the 

 inner lip with plaits ; inner lip broad, spreading. 

 G. zonata. En. Metli. 374. f. 6. 



Marginella Lam. 



Oval ; spire slightly prominent ; 

 Y 2 



