86 GASTEROPODA., HELICID. 
2. CxiavsiziA Rotpui. Pi. 8. fig. 9. 
C. testa subventricosa, subpellucida ; anfractibus transversim 
elevato-striatis ; apertura bilamellata: interstitio biplicato. 
Animal nigrum ; tentacula dilutiora. 
Habitat in Anglia prone Charlion, in Cantio, rarissima. 
Shell somewhat ventricose, slightly pellucid ; the whorls with 
elevated strize ; aperture with two lamellee; the space between 
them with two folds. Height five-eighths of an inch. 
Colour horny brown. Striz regular and somewhat distant. 
Operculum white, the anterior or dilated portion rather wide. 
This new species was discovered by Mr. Rolph, in Charlton 
Wood, Kent, and it has since been found there by myself under 
moss. ‘The wood having been cut down, and the land culti- 
vated, no specimens have been taken for several years. 
In some respects this shell is allied to C. plicatula, of Dra- 
pernaud, but is always larger, more ventricose, and the striz 
are more distant. 
Animal black ; the tentacula of a paler hue. 
3. CLAUSILIA BIPLICATA. 
C. testa fusiformi-ventricosa, subopaca ; anfractibus transversim 
elevato-striatis ; apertura bilamellata. 
Turbo biplicatus, Mont. Test. Brit. 361; M. & R. Trans. 
Linn. Soc. viii. 179; Turt. Conch. Dict. 224; Dill. Desc. 
Cat. 874. 
Clausilia ventricosa, Drap. Hist. des Moll. 71. pl. 4. fig. 14. 
Odostomia biplicata, Flem. Hdinb. Encycl. vi. 77. 
Animal nigrum, tentaculis et pede dilutioribus. 
Habitat in paludosis, sub cortice salicum emortuarum circa 
Londinum, frequens. 
Shell club-shaped, ventricose, somewhat opake; the whorls 
with transverse elevated strize; aperture with two lamelle. 
Height three-quarters of an inch. 
Animal black, its tentacula and foot pale black. Operculum 
anteriorly rounded. 
C. biplicata is readily distinguished from its British con- 
geners by its superior size, if we except C. laminata, which 
