68 helicid^:. 



to half the total diameter. Peristome thin, usually 

 dark liver-coloured within, edged inside with a remote 

 white rib, slightly expanding above, reflected below, 

 dilated upon the columella, where it is subarcuated and 

 rather oblique. Umbilicus large and profound. 



Diameter half an inch ; specimens of three-quarters of 

 an inch in diameter have been recorded, but are not 

 common. A smaller, stronger, and more globular form 

 exists in the north, with a more elevated spire, and a 

 paler style of colouring both externally and internally. 



The animal is grey upon the head and neck, with dark 

 or brownish bands ; its tentacles are long, the sides of 

 the foot are pale yellowish white. The foot itself is 

 narrow, and terminates in an acute tail, which does not 

 project beyond the shell when the creature is crawling. 



This snail is most abundant, and the specimens finest 

 in limestone and chalk districts. In the south of Eng- 

 land and Ireland it is very common, more so than in the 

 northern parts of the British islands. 



H. hispida, Linnaeus. 



Reddish horn-coloured, more or less depressed ; outer lip edged 

 below with white internally ; umbilicus moderately large. 



Plate CXVIII. fig. 1, 2, 3, and (animal) Plate G.G.G. f. 1. 



Ispida, Linn. Syst. Nat. ed. 12, p. 1244. — Da Costa, Brit. Conch, p. 58, 

 pi. 5, f. 10. — Pulteney, Hutchins, Hist. Dorset, p. 47. — 

 Donovan, Brit. Shells, vol. v. pi. 1.51, f. 1. — Dorset Catalog 

 p. 54, pi. 21, f. 10. — Jeffreys, Trans. Linn. Soc vol. xvi. p 

 ':;::.— Turt. Manual L. and F. W. Shells, p. 57, f. 41.— Gray 

 Manual L. and F. W. Shells, p. 154, pi. 4, f. 41.— THOMPSON 

 Ann. Nat. Hist. vol. vi. p. 27.— Macgilliv. Moll. Aberd. p 

 85.— Brown, Ulust. Conch. G. B. p. 48, pi. 17, f. 40, 46.— 

 Muller, Hist. Verm. pt. 2, p. 73. — Drap. Moll. Terr, et 

 Fluv. France, p. 103, pi. 7, f. 20, 21, 22— Lam. (ed. Desh.) 

 Anim. s. Vert. vol. viii. p. 73. — C. Pfeif. Deutsch. Land nnd 



