46 



MOLLUSCA. 



[Trachelipoda 



Sub-Genus 4 Hklicella. — Ferussac. 



Shell depressed; base of the body provided with a large um- 

 bilicus. 



10. Helix Cantiana, pi. XVII, f. 15, 16, 17 First Ed., 



pi. 40, f. 15, 1(3, 17- 



Helix Cantiana, Montagu, Test. Brit., p. 422, pi. 23, f. 1 ; 

 Maton and Kackett, Linn. Tr., VIII, p. 197; Turton, Brit. Fau., 

 p. 189; Brown, Ency. Brit., 6th Ed., VI, p. 457; Fleming, 

 Edin. Ency., VII, p. 79; lb., Brit. An., p. 261 ; Teba Cantiana, 

 Leach, Moll., p. 94 ; Helix Carlhusiana, Drapernaud, p. 102, 

 pi. 6, f. 33; Turton, Man., p. 36, pi. 3, f. 26; Alder, Mag. Zool. 

 and Bot., II, p. 106; Brard, p. 24, pi. 1, f. 6; Ferussac, Prod., 

 p. 43; Rossmassler, V, VI, p. 36, pi. 27, f. 364; Helix pallida, 

 Donovan, Brit. Sh., V, pi. 157, f- 2; Helix circinnata, Ross- 

 massler, I, p. 64, pi. 1, f. 12. 



Shell subpellucid, thin, generally of a yellowish-white, but 

 sometimes lead-coloured ; body large, tumid, with an obscure 

 central band ; the base and aperture of a rufous colour ; spire 

 small, subdepressed, consisting of five moderately rounded 

 volutions; aperture semielliptical, its length and width being 

 nearly equal; outer lip thin, but not reflected; internal rib of a 

 pale rose-colour, or white ; whole surface covered with minute, 

 irregular, longitudinal stria*; umbilicus rather small. Diameter 

 three-cpaarters of an inch ; height about half an inch. 



Young shells are very pale in the colour, and with the epi- 

 dermis slightly hispid. The adult bears some resemblance to 

 //. rufescens, but may be distinguished by its greater con- 

 vexity, superior size, in the stria; less regular and strong, in 

 being devoid of the subcarinated band round the body, and in 

 the umbilicus being considerably less in proportion to its size. 



This species frequents the chalk districts of Kent, and is an 

 extremely local shell. 



11. Helix Cakthusiana, pi. XVII, f. 49, 50, 51 First 



Ed., pi. 40, f. 49, 50, 51. 



Helix Carthusiana, Midler, Verm., p. 15; Helix Carthusi- 

 anella, Drapernaud, p. 101, pi. 6, f. 31, 32 ; Alder, Mag. Zool. 

 and Bot., II, p. 106; Brard, p. 24, pi. 1, f. 7; Turton, Man., 

 p. 37, f. 27; Helix Gibsii, Leach, in Brown, Illust. Conch., 1st 

 Ed. ; Ferussac, Journ. de Phys., XC, p. 300 ; Helix Zenobia 

 bimarginata, Gray, Med. Rep., 1821; Helix rufilabris, Jeffreys, 

 Linn. Tr., XVI, p. 509; Teba Carthusiancllu, Leach, Moll., p. 

 95, pi. 8, f. 4, 5, 6. 



Shell subdepressed, subpellucid, glabrous, of a grayish-brown; 

 body large, inflated on the sides; spire very small, but little 

 elevated, consisting of three slightly defined volutions, termi- 

 nating in a subacute apex; aperture sublunate ; outer lip thin 

 on the margin, with a milk-white, transverse, rather broad band 

 on the outside; base provided with a very small umbilicus, 

 which is partly covered by the columellar lip. 



The //. Carthusiamlla is subject to some variety, in size, 

 thickness, and also in the consistence of the shell. One variety 

 is smaller, and more convex. 



This species inhabits the chalk districts of Sussex and Kent, 

 among short grass ; and is also common on the coast betwixt 

 Dover and Brighton. 



12. Helix hufescens, pi. XVII, f. 47 and 53 First Ed., 



pi. 40, f. 47 and 53. 



Helix rufescens, Pennant, Brit. Zool., IV, p. 134, pi. 85, f. 

 127 ; Montagu, Test. Brit., p. 420, pi. 23, f. 2 ; Turton, Brit. 

 Fau., p. 189; lb., Man., p. 37, f. 28; Fleming, Edin. Ency., 

 VII, p. 79; lb., Brit. An., p. 261; Brown, Ency. Brit., 6th Ed., 

 VI, p. 457; lb., Wemerian Mem., II, p. 525; Thompson, Ann. 

 and Mag. Nat. Hist., VI, p. 28; Jeffreys, Linn. Tr., XIII, p. 

 337; Ferussac, Prod., p. 44; Donovan, Brit. Sh., V, pi. 157, f. 

 1 ; Maton and Rackett, Linn. Tr., VIII, p. 196; Helix hispida, 

 Donovan, V, pi. 151, f. 1 ; Helix glabella, Drapernaud, p. 102, 

 pi. 7, f- 6; Pfeiffer, p. 34, pi. 2, f. 16; Alder, Mag. Zool. and 

 Bot., II, p. 107 ; Teba rufescens, Leach, Moll., p. 96 ; Cochlea 

 rufescens, Da Costa, p. 80, pi. 4, f. 6. 



Shell subdepressed, subopaque, rufous brown ; body large ; 

 spire small, consisting of five slightly elevated and moderately 

 inflated volutions, well defined by the sutural line; centre of 

 the body volution encompassed by a slight subcarinated girdle, 

 of a paler colour than the rest of the shell, but which does not 

 extend to the volutions of the spire; aperture semilunar, some- 

 what longer than broad ; outer lip thin, slightly reflected at the 

 lower augle ; whole surface covered with longitudinal, wrinkled 

 striaa; umbilicus large and deep. Diameter frequently nearly 

 three-quarters of an inch. Its general dimensions smaller. 

 The young of this shell is destitute of hairs. 

 This species is liable to some variations in colour. 

 13. Helix limbata, pi. XVIII, f. 29, 30. 

 Helix limbata, Drapernaud, p. 100, pi. 6, f. 29; Ferussac. 

 Prod., p. 43 ; Michaud, Compl., p. 24 ; Rossmassler, Icon., V, 

 p. 35, pi. 26, f. 362 ; Alder, Mag. Zool. and Bot., II, p. 106. 



Shell suborbicular, of a white or reddish colour ; body large, 

 with an opaque, slight carina round its centre ; spire about a 

 third of the length of the body, consisting of four somewhat 

 narrow, slightly inflated and subdepressed volutions, terminating 

 in a rather obtuse apex ; aperture sublunate, very oblique, and 

 slightly narrowed in the centre of the outer lip, which is thin, 

 plain, slightly reflexed, and margined with white; pillar lip a 

 little reflexed over the umbilicus, which is rather small and 

 narrow; whole surface very finely striated. Length nearly half 

 an inch; diameter upwards of half an inch. 



This species is subject to considerably variety in colour; beiii" 

 sometimes reddish-brown, and at others of a clear white. 



Discovered by Mr. G. B. Sowerby on the New North Road 

 to Barnet, near Hampstead, in a hedge row, and attached to 

 brambles. The //. limbata is a native of France, Switzerland, 

 and Germany, and has in all probability been an introduced 

 species, as the above is the only locality where it has hitherto 

 been noticed in Britain. 



14. Helix fulva, pi. XVII, f. 2 First Ed., pi. 40, f. 2. 



Helix fulva, Midler, Verm. Hist., II, p. 56, No. 249; Dra- 

 pernaud, p. 81, pi. 7, f. 12, 13; Pfeiffer, I, p. 23, pi. 2, f. 2 ; 

 Turton, Man., p. 61, f. 47; Alder, Mag. Zool. and Bot., II, p. 

 108; Thompson, Ann. and Mag. Nat. Hist., VI, p. 25; Helix 

 trochiformis, Montagu, Test. Brit., p. 427, pi. 11, f. 9; Turton, 

 Brit. Fau., p. 189; Fleming, Edin. Ency., VII, p. 80; Maton 

 and Rackett, Linn. Tr., VIII, p. 200; Jeffreys, Linn. Tr., XVI, 

 p. 331; Helix Trochitus, Fleming, Brit. An., p. 260 ; Brown, 

 Ency. Brit., 6th Ed., VI, p. 458 ; Teba fulva, Leach, Moll., p. 

 99 ; Helix tiitidula, V. Alten, S. 53, pi. 4, f. 8. 



