FAMILY COLIMACEA. 67 



The geographical range of H. Cantiana is confined chiefly in this 

 country to the south-eastern counties, including Essex. Specimens 

 have been taken in the north and west of England, but it is hardly 

 indigenous in those parts. Mr. Guise informs me that he lately 

 met with H. Cantiana in abundance near the sea, between Swan- 

 sea and Oystermouth, in South Wales, under circumstances which 

 left no doubt in his mind that it had been transported thither. In 

 Ireland it is unknown. In France it inhabits chiefly the central 

 and southern departments. In Portugal it is recorded by M. 

 Morelet as H. Carthusianella, larger opal-white variety, met with 

 by him only in the environs of Oporto. 



In my monograph of Helix in Conch. Iconica (pi. clxii. fig. 1079), 

 I figured H. limbata, Drap., as a British species, on the strength of 

 the discovery of some specimens by Mr. Sowerby, in the neigh- 

 bourhood of Hampstead. Its claim to a place in our fauna has not 

 however been confirmed by subsequent collectors. It is a native of 

 Central and South France, and comes as near to us as the environs 

 of Dieppe. 



6. Helix Carthusiana. Carthusian Helix. 



Shell ; minutely umbilicated, globosely depressed, whitish horny, 

 semitransparent, spire but little raised, whorls 

 six, rounded, rather produced at the periphery, 

 minutely arcuately striated, shining ; aperture 

 broadly lunar, ribbed within, rib milk-white, lip 

 sharp, a little expanded, more or less stained with 

 red, columellar margin dilately reflected, but not 

 sufficiently to hide the umbdicus. 



Helix Carthusiana, Muller (1775), Verm. Hist, part ii. p. 75. 



Helix nitida, Chemnitz (1786), Conch. Cab. vol. ix. part 2. p. 103. pi. cxxvii. 

 f. 1130, 1131. 



Helix arenaria, Olivi (1792), Zool. Adriat. p. 178. 



Helix Carthusianella, Draparnaud (1801), Tabl. Moll. p. 86. 



Helix (Zenobia) bimarginata, Gray (1821), Lond. Med. Repos. p. 239. 



Theba Carthusia7iella and Charpentieri, Risso (1826), Hist. Nat. Exirop. 

 Merid. vol. iv. p. 75. 



Helix Gfibsii, Montagu (1827), fide Leach, Brown, Illus. Conch. Brit. pi. 

 xl. f. 49, 51. 



Helix rufilabris, Jeffreys (1833), Trans. Linn. Soc. vol. xvi. p. 509. 



Monacha Carthusianella, Fitzinger (1833), Sgst. Verz. p. 95. 



f2 



