Mollusca of Great Britain. S6l 



On the waterflag in marshy ground at Marino near 

 Swansea, and among the rejectamenta of the Avon river 

 near Bristol. 



The Helix minuta of Miiller, referred by Montagu with 

 doubt to the present species, is probably the Cyclostoma 

 vitreum of Draparnaud (a variety of the Paludina acuta), 

 and is a freshwater shell. 



Genus IX. VERTIGO. Mull. 



Animal corpore attenuato. Tentacula inferiora punctiformia, 



vdldh indistincta. 

 Testa cylindraceo-fusiformis, spir4 brevi, sinistrors^. Apertura 



extiis marginata, sinuata, inti\s denticulis coarctata : 



peristomio subreflexo. 



1. PUSILLA. 



Animal griseum, subt^s pallidius. Sustentaculum angustum. 



Testa ventricosior, attenuata, glabra, nitidula, fragilissima, 

 pallida fusca. Anfractus 5. Apertura subquadrata, 

 subtiis rotundata, lamellis 6 — 7 albis, nempfe 2 vix 3 

 columellaribus et 4 labralibus munita : peristomio tenui. 

 Umbilicus subangustatus. 



Long. 0.085.— Diam. 0.045. 



Vertigo pusilla. Milll. Verm. 2. p. 124. 



Pupa Vertigo. Drop. Hist. des Moll. p. 61. t.3.f.34,35. 



Alive under moss in a coppice at Newton near Swansea, 

 and among the rejectamenta of the Avon river near Bristol. 



2. Angustior. 



Animal 



Testa ventricosior, subdolioliformis, pallid^ fulva, argute et 



3 A 2 lentissimfe 



