MoUusca of Great Britain. 339 



Testa utrinque depressior, fragilis, albida, fasci4 superiore 

 rufescenti-brunne4 aliisque saepb divisis inferioribus, 

 Anfractus 5 — 6. Apertura orbiculata, intils margi- 

 nata : peristomio subreflexo. Umbilicus valdh patens, 

 sinu prof undo. 



Long. 0.35. — Diam. 0.65. 

 Helix ericetorum, jQ. MUIL Verm. 2. p. 34. 



Common on heaths, sandy plains, &c. It does not 

 exactly agree with any of the varieties of Draparnaud's 

 ericetorum or cespitum. 



20. NiTIDA. 



Animal caerulescenti-nigrum, politissimum. Tentacula bre- 



via, crassiuscula. 

 Testa subdepressa, nitidissima, substriata, fulvo-cornea. 

 Anfractus vix 5. Apertura suborbiculato-ovata : pe- 

 ristomio simplici. Umbilicus patulus, sinu profundo. 



Long. 0.15.— Diam. 0.275. 

 Helix nitida. Miill. Verm. 2. p. 39- Lam. Hist, des 

 Anim. sans Vert. 6. p. 91' 



nitens. Gmel. Syst. Nat. 1. p. 3633. 



lucida. Drop. Hist, des Moll. p. 103. /.8./. 11,12. 



(var.) Mont. Test. Brit. p. 425 ? 

 a. paul6 minor, striata ; anfractibus 6, sensim decrescenti- 



bus, convexis. 

 /3. hyalina, albido-virescens. 



Not uncommon under stones, at the roots of rushes &c., 

 in marshy places near Swansea. Some specimens nearly 

 equal the largest size noted by Miiller, 3-|^ lines of our mea- 

 sure. The var. /3. I received from Mr. Dillwyn as Irish. 



Gmelin, by changing the name given to this species by 

 Miiller, has created no little confusion. 



21. NiTIDULA. 



