MARGINELLA. VOLVARIA. OVULA. 121 
tant chestnut lines, sometimes forked as they near 
the lip; pillar with seven plaits; lip striated 
within. %. E. 377. 4. 
VOLVARIA. 
Shell cylindrical, convolute; spire scarcely exserted ; 
aperture narrow, as long as the shell; colu- 
mella with one or more folds at its imferior 
part. 
V. TRITICEA. Ovate-oblong, sub-cylindrical, 
whitish, generally with fulvous zones ; spire rather 
prominent; lip depressed towards the middle; 
columella straight, with about four plaits. W. 
19. 54. 
LES ENROULEES. 
OVULA. 
Inflated, attenuated, or acuminated at each end; 
lips curved inwards; aperture longitudinal, 
narrow, effuse at the extremities; left lip not 
indented. 
O. oviFoRMIs. Ovate, inflated, ventricose in 
the middle, smooth, milk-white; the extremities 
rather prominent ; sub-truncated ; throat orange ; 
lip toothed. 34. W.18. 1. 
QO. verrucosa. Ovate, gibbous, transversely 
G 
