FAMILY C0L1MACEA. 89 



Bulimus acutus, Bruguiere (1789), Enc. Meth. vol. vi. part 1. p. 323. 

 Turbo Turricula Maroccana, Chemnitz (1795), Conch. Cab. vol. ii. p. 280. 



pi. ccix. f. 2063. 

 Helix bifasciata, Pulteney (1799), Cat. Dorset, p. 49. 

 Bulimus variabilis, Hartmann (1815), Sturm, Faun. vol. vi. n. 12. 

 Bulimus articulalus, Lamarck (1819), Anim. sans vert. vol. vi. part 2. p. 



124. 

 CocMiceUa meridionalis, Bisso (1826), Hist. Nat. Europ. Merid. vol. iv. 



p. 78. pi. iii. f. 26. 

 Lymncea fasciata, Fleming (1830), Edin. Ency. vol. vii. part 1. p. 78. 

 Elisma fasciata, Leach (1831), Brit. Moll. p. 109. 

 Bulimus ventricosus, Turton (1831), Man. p. 84. f. 69. 

 Bulimus turritella, Andrz. (1832), Kryn. Bull. Mosc. vol. vi. p. 415. 

 Bulimus elongatus, Cristofori and Jan (1832), Cat. Conch, n. 1772. 

 Cochlicellus acutus and Maroccanus, Beck (1837), Ind. Moll. p. 63. 

 Bulimus litoralis, Brumati (1838), Conch. Montfalc. p. 34. f. 9. 

 Helix (Cochlicella) acuta, Moquin-Tandon (1855), Hist. Moll. vol. ii. p. 



280. pi. xx. f. 27 to 32. 

 Hab. South-western Europe. Chiefly south and west of England and 



Ireland. (Abundant near the sea, especially on chalky or sandy 



soils.) 

 To an attentive observer of shell- structure viewed in relation with 

 the physical conditions with which the animal producing it is sur- 

 rounded, Bulimus acutus may be readily seen to be an inhabitant of 

 a dry soil, rather bare of vegetation, in the vicinity of the sea. The 

 shells of niollusks affecting this habitat are generally opake-white, 

 more or less variegated and banded, as in Helix virgata and eriee- 

 torum, or horny, obbquely streaked with opake-white. This type 

 of structure is especially developed in the shells of the numerous 

 small JBulimi which inhabit the sandy plains and elevated grounds 

 of Chili and Peru ; and our Bulimus acutus, of similar habit, has a 

 shell of much the same character. It is of a delicate horny sub- 

 stance, composed of from eight to nine whorls slenderly acuminately 

 convoluted, obliquely streaked throughout with opake-white, on a 

 yellowish, sometimes a brown ground ; and round the base of the 

 whorl there is almost invariably a fuscous-black band, which is con- 

 cealed from view in all but the last whorl by the overlapping of one 

 whorl upon the other. The animal, M. Moquin-Tandon says, is 

 that of Helix, the structure of the jaw leaving no doubt on this 

 subject ; it is, therefore, a form intermediate between the two genera. 

 It is, he adds, an active but very irritable creature, withdrawing 

 itself into the shell on the sHghtest touch. 



