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. Repos. 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. — r Clausilia plicatula. Drap. Hut. p. 74. t. 4. 
17, 18.?; Brard, p. 85. t. 3. f. 10.?; Jeffrey.^ Linn. Trans. 
xvi. 353.; Eossm. Leon. i. p. 39. f. 32., vii. f. 471 — 475.; 
Forst. N. Act. Leop. xix. t. 58. f. 7. ; Forbes and Hanley, 
B. M. iv. 120. t. 129. f. 3. — Turbo controversus. Alien, 
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.) 
