COLIMACEA. 73 



Sub- Genus 5. — Heliosianes. — Ferussac. 



Suhglohose, umbilicated ; peristome not reflected ; epidermis 

 thin ; epiphragm memhranaeous. 



24. Helix virgata, pi. VIII, f. 1,2, 3. 



Helix virgata, Montagu, Test. Brit., p. 415, pi. 24, f. 1 ; 

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

 Brown, Wernerian Mem., II, p. 524; Maton and Rackett, Linn. 

 Tr., VIII, p. 195; Turton, Man., p. 40, f. 31 ; Thompson, Ann. 

 and Mag. Nat. Hist., VI, p. 28; Helix zonaria, Pennant, Brit. 

 Zool., IV, p. 137, pi. 85, f. 133; Donovan, Brit. Sh., pi. 65; 

 Helix variabilis, Drapernaud, p. 84, pi. 5, f. 11, 12 ; Lamarck, 

 An. San. Vert., VI, pt. 2nd, p. 83 ; Rossmassler, Icon., VI, p. 

 31, pi. 26, f. 356, a tof; Ferussac, Journ. Phys., p. 297 ; Alder, 

 Mag. Zool. and Bot., II, p. 109; Helix striata, Brard, p. 36, 

 pi. 2, f. 5, 6; Teba virgata, Leach, Moll., p. 93; Helix viigata, 

 Brown, Illust. Conch., p. 49, pi. 17, f. 42, 43, 44; lb.. First 

 Ed., pi. 40, f. 42, 43, 44. 



Shell subglobose, subpellucid ; body large ; spire small, con- 

 sisting of five considerably inflated volutions, deeply defined by 

 the sutural line ; aperture sublunated, longer than wide, of a 

 pale purplish-brown internally, inside with a narrow, white, 

 thread-like elevation ; outer lip thin, but not reflected ; pillar 

 lip slightly reflexed over the umbilicus ; whole surface white, 

 tinged with pale pink, usually with a dark purplish-brown zone 

 round the centre of the body, continuing spirally at the base 

 of the volutions of the spire, until it reaches the apex ; base 

 of the body generally with three or four concentric lines of 

 the same dark colour ; these in some instances are confluent, 

 the intervening colourless parts appearing in spots ; others are 

 provided with two or three broader circular bands at the base, 

 none of which, however, run close to the umbilicus, which is 

 only of moderate size, but deep. Ordinary diameter three- 

 eighths of an inch ; but is frequently met with three-quarters 

 of an inch. 



This shell is subject to great variety in colour, and also in 

 the number and disposition of its bands and markings ; one of 

 which is of a dark chocolate-brown, with a white central band 

 round the body ; sometimes it is pure white, and destitute of 

 bands, while in other white specimens the zones are quite dis- 

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