CYCLOSTOMA. 137 
Order.—OPERCULATA. 
Sub-order.—PULMONATA. 
Lamtly.—CYCLOSTOMATID. 
Genus.—CycL6sToMA. 
Shell spiral ; mouth round ; umbilicus small, operculate. 
C. ELEGANS (elegant) Miller. Pl. V., f. 10. 
Globosely oval, solid, opaque, light pink, marked with streaks or 
spots of a darker colour ; very strongly striated in the line of growth, 
and more closely striated spirally; whorls 44, cylindrical; szture 
very deep; sfzre blunt ; south nearly circular ; zebzlicus small, but 
deep ; operculum thick, testaceous. A.15 mm. B. 10 mm. 
This interesting shell is the only British representative 
of an interesting genus which abounds in species in 
warmer latitudes. 
It is common in England and Wales, always on cal- 
careous soils especially on pure chalk formations. It has 
not been recorded for Scotland or Ireland. Along the 
banks of the Thames between Marlow and Maidenhead it 
occurs in great abundance on the chalk hills, and through- 
out the calcareous districts of Kent. I have taken it in very 
small areas where there is an outcrop of chalk, in the 
midst of other formations by no means suitable. It is 
also tolerably plentiful in Jersey, where there are no cal- 
careous strata. I have observed it on tree trunks at 
Cooper’s Hill and at Ewell. 
Var. I. mdrmorea (Brown). Entirely free from stri- 
ation. 
