CLAUSILIA. 185 



the margin white, and detached all round. Varies 

 with one or two additional minute denticles in the 

 mouth. 



M. Ferussac originally referred T. biplicatus Mont, 

 to C. ventricosa Drap. ; but he afterwards adopted the 

 opinion that they were distinct. The British shell is 

 more slender and spindle-shaped than the French ; 

 they are, perhaps, only local varieties; but it is 

 extremely difficult to define the species of this 

 genus. 



This species was first described as British by 

 Montagu. 



85. 3. CLAUSILIA Rolphii. Eolph's Close Shell. 

 Shell ventricose, thin, opaque, red-brown, with 

 regular crowded raised striae; aperture with 

 four or five plaits, two of which are longer, 

 (t. 5. f. 54.) 



Clausilia (Iphigenia) Rolphii. Gray, Med. Eepos. 1821, 182. 

 Clausilia Rolphii. Leach, in Gray, Ann. Phil 1825,413.; 

 Ferussac, Journ. Phys. 1820, 301.; Leach, Syn. Moll. 86. 

 t. 8. f. 9.; Alder, Mag.Zool and Bot. ii. 111.; Turton, Man. 

 ed. 1. 71. f. 54.; Moq. Tand. Moll Franc, ii. 343. t. 24. 

 f. 32 39. Clausilia plicatula. Drap. Hist. p. 74. t. 4. 

 17, 18.?; Brard, p. 85. t. 3. f. 10.?; Jeffreys, Linn. Trans. 

 xvi. 353.; Eossm. Icon. i. p. 39. f. 32., vii. f. 471475.; 

 Forst. N. Act. Leop. xix. t. 58. f. 7. ; Forbes and Hanley, 

 B. M. iv. 120. t. 129. f. 3. Turbo controversus. Alten, 

 Augsb. 18. t. 2. f. 3. Stomodonta plicatula. Mermett, 

 Moll. Pyr. 47. Clausilia Mortelleti. Dumont, 1853 ; 

 Schmidt, Ann. and Mag. N. H. xvii. 10. 1856; Prentice, 

 Ann. and Mag. N. H. xviii. 446. 



In damp places in woods, among the moss and 

 stones, under nettles and dogs' mercury, and on 

 trunks of trees, on a chalky soil. (Mr. Rolph, 1817.) 



