COLIMACEA. 55 



purple. Length generally about two inches; diameter not 

 quite so much. 



The favourite habitats of this species are hedges, woods, and 

 chalky soil. It does not extend further north in England than 

 the midland counties. 



Fig. 3 represents the young shell. 



The H. Pomatia is the largest of the British land shells, and 

 is subject to some variety, both as regards colour and size, and 

 relative proportion of the spire to the body. Reversed speci- 

 mens have been met with, and others with the convolutions 

 disunited and scalariform. 



This shell has, by some authors, been supposed not an abo- 

 riginal species, but to have been introduced from Italy about 

 the middle of the sixteenth century by a Mr. Howard, and first 

 turned out at Albury, in Surrey. They seem to have increased 

 much, and spread themselves over most of the southern coun- 

 ties. We are, however, of opinion that it is a native of 

 England. 



This species was a favourite food with the ancient Romans, 

 and is eaten in many parts of Europe at the present time. 

 2. Helix aspersa, pi. VI, f. 4, 5, 6, 1. 

 Helix aspersa, Miiller, Verm., II, p. 59, No. 253 ; Gmelin, 

 Linn. Syst., p. 3631, No. 58; Lister, Conch., pi. 49, f. 47; 

 Turton's Linne, IV, p. 515; Montagu, Test. Brit., p. 409; 

 Drapernaud, p. 89, pi. 5, f. 23; Brard, p. 7, pi. 1, f. 1 ; Brown, 

 Ency. Brit., 6th Ed., VI, p. 460 ; Fleming, Edin. Ency., VII, 

 p. 81 ; lb., Brit. An., p. 263; Turton, Man., p. 52, f. 35; 

 Leach, Moll., p. 82 ; Rossmassler, pt. 5th, p. 5, pi. 22, f. 294, 

 and small var. Mazzublii, p. 5, pi. 22, f. 296 ; Jeffreys, Linn. 

 Tr., XVI, p. 328; Alder, Mag. Zool. and Bot., II, p. 106; 

 Thompson, Ann. and Mag. Nat. Hist., p. 20 ; Forbes, Mai. 

 Mon., p. 7; Helix hortensis, Pennant, Brit. Zool., IV, p. 136, 

 pi. 84, f. 129; Turton, Brit. Fau., p. 191 ; Brown, Wernerian 

 Mem., II, p. 527; Donovan, Brit. Sh., IV, pi. 131 ; Cochlea 

 vulgaris, Da Costa, p. 72, pi. 4, f . 1 ; Helix aspersa, Brown, 

 lUust. Conch., p. 43, pi. 16, f. 5, 13, and 17; lb., First Ed., pi. 

 39, f. 5, 13, and 17. 



Shell subgiobose ; body large ; spire small, consisting of four 

 nearly parallel, rather tumid, but narrow volutions, terminating 

 in a somewhat obtuse apex ; aperture semilunar, a little longi- 



