71 



Shell half an inch long, of a glassy reddish horn- 

 colour and nearly smooth : spire composed of 

 twelve raised volutions : aperture roundish-oval 

 with a white thick margin, attached at the upper 

 part to the body volution, with two laminar folds, 

 one of them straight and placed near the top of 

 the aperture and almost central, the other curved 

 and in the middle of the pillar lip, frequently cre- 

 nate ; and deep within the mouth are three or four 

 permanent ridges which are visible on the back at 

 the outside when held before a strong light. 



In beech woods, among decayed leaves. 



54. CLAUSILIA plicatula. Shell ventricose, opake, 

 with regular raised striae : aperture with four or 

 five plaits, two of which are larger. 



a. with four plaits, the two middle ones less. 



b. with five plaits, the three middle ones less. 



c. with five plaits, the three lower ones less. 



Clausilia plicatula. Drap. p. 74. t. 4./. 17, 18. 



. Brard,p. 85. t. 3.f. 10. 



Clausilia Rolphii. Leach, Mollusc, p. 119. 



Shell an inch long, of a greyish-brown horn-colour, 

 tumid in the middle : spire composed of ten or 

 eleven rather swollen volutions which are marked 



