138 



For this species I am indebted to Mr. Chitty. It was 

 found at Easington, in the parish of St. David's. 



Mean divergence about 45° ; length .96 inch after trunca- 

 tion ; greatest breadth .63 inch ; least breadth .55 inch. 



Cyclostoma lamellosum. Shell ovate conic, rather short : 

 with several inequidistant unequal more or less interrupted 

 spiral lines of brown, of which four or five appear on the pe- 

 nult whorl : with ratlier closely set sharp elevated transverse 

 lamellae, which are more prominent at the sutures ; without 

 spiral stricB, except a few ridges in the umbilicus : apex trun- 

 cate with the loss of two or three whorls : spire with the out- 

 lines quite convex : about three and one-half whorls remain- 

 ing, very convex, with a rather deep suture : aperture orbicu- 

 lar, with two peritremes, of which the outer one is narrow, 

 auriculate above, reflected nearly into the plane of the aper- 

 ture ; the inner peritreme is rather stout, well produced, a 

 little reflected. The operculum has a spiral lamella, which 

 has about four and one-half whorls, and is but little elevated 

 and much produced laterally. 



Mean divergence about 50° ; length after truncation .49 

 inch ; greatest breadth .4 inch ; least breadth .34 inch. 



This shell much resembles C. tectilabre, but the outer per- 

 itreme is more expanded, and the margin of the operculum is 

 not reflected backwards. 



Cyclostoma simulans. Shell long ovate conic : very pale 

 brown or dingy white, with numerous spiral series of small 

 dark brown spots, which are often elongate, and which are 

 arranged in inequidistant transverse stripes : with closely set 

 rather strong transverse raised lines and indistinct spiral striae, 

 moderately crenulate along the suture : apex truncate with 

 the loss of — whorls : spire with the outlines moderately cur- 

 vilinear : whorls remaining after truncation four or five, quite 



