128 PNEUMONOBRANCHIATA. 



crushed specimen in mud under the side of a hedge in 

 Guernsey, in such situations as he had observed the 

 animal in Provence; he presented the specimen to 

 the British Museum. It is common in the islands 

 and on the shores of the Mediterranean, and is eaten in 

 Provence, where it is regarded as the most delicate 

 kind of snail. 



b. ACAVUS Montf. (Tachea Leach.") 



Shell subglobose banded; peristome rather thickened, 

 reflexed, with an internal rib ; axis perforated, per- 

 foration covered in the adult specimens ; epiphragm 

 membranaceous. 



19. 2. HELIX aspersa. Common Snail, (t. 5. f. 35.) 

 Shell somewhat globular, with the surface 

 wrinkled, yellowish-brown or olive, with four 

 brown bands; whorls four; mouth roundish lu- 

 nate ; the peristome white and reflected. 



Helix aspersa. Mutter, Verm. ii. 59.; Montagu, 

 p. 407. ; Drop. p. 89. tab. 5. f. 23. ; Brard, p. 

 7. tab. 1. f. 1.; Turton, Man. 52. f. 35.; Leach, 

 Mollusc, p. 82.; Jeffreys, Linn. Trans, xvi. 328* 



Helix hortensis. Perm. Zool. iv. 136. t. 84. f. 129.; 

 Donovan, t. 131.; Turt. Diet. p. 60. 



Helix grisea. Dillwyn, p. 943. 



lucorum. Pulteney. 



Cochlea vulgaris. Da Costa, p. 72. t. 4. f. 1. 



Inhab. gardens, old walls, &e. Common. 



Animal warty, yellowish grey, with a paler dorsal 

 streak. (Rossm. Icon. t. 4. f. 75.) 



Shell an inch and a half in diameter, covered with 

 a creased or coarsely wrinkled skin, somewhat glo- 



