184 HELICID^. 



variety to be characterised by the internal lamina 

 being notched. 



b. Clausium entire at the top ; shell corrugated. (Iplii- 

 genia Gray?) 



34. 2. Clausilia biplicata. Folded Close Shell. — 

 Shell ventricose, opaque grey-brown, with re- 

 gular raised strias; aperture with two plaits, 

 the margin detached all round, (t. 5. f. 55.) 



Turbo biplicatus. Mont.^. 361. t. 11. f. 5. — Clausilia ven- 

 tricosa. C. Pfeiffcr, D. Moll. i. 63. t. 3. f. 29.; Drap. 

 p. 71. t. 4. f. 14.; Jeffreys, Linn. Traits, xvi. 354. — Clausilia 

 biplicata. Leach, Moll. ; C. Pfeiffer, D. Moll. i. 63. t. 3. 

 f. 27.; Forbes and Hanley, B. M. iv. 118. t. 129. f. 4.— 

 Clausilia jNIontagui. Gray, Ann. Phil. 1825,413. — Helix 

 perversa, adult. Midler, Venn. ii. 118.(?) — Helix (Cochlo- 

 dina) ventricosula. Feruss. Tab. 63. — ClausiUa similis. 

 Charpent. in Rossm. Icon. i. 77. f. 30., vii. f. 168., xi. f. 705, 

 706.; Gray, Ann. Phil. 1825, 413. — Cochlodina similis. 

 Ferussac? — Clausilia plicata. Gtirt. Wett. Conch. 22. — 

 C. perversa. C. Pfeiffer, D. Moll. i. 63. t. 3. f. 29.— Odo- 

 stomia biplicata. Flem E. Ency. vii. 77 — Clausilia vivipara. 

 Held. Isis, 1837, 319. — Clausilia cordata ; C. vulnerata; 

 C. Infulastbrmis ; C. radicans; C. rostrata ; and C. qua- 

 drata. Forst. N. Act. Leop. xix. 269—275. t. 58. f. 1—6. 

 1841. 



In woods and close hedges. 



Animal dark grey. 



Shell nearly three quarters of an incli long, dai'k 

 grey, opaque, regularly striate longitudinally ; spire 

 consisting of eleven or twelve rather flat but well- 

 defined volutions ; the suture a depressed line ; aper- 

 ture oval, a little sinuous at the upper and inner 

 angle, with two plaits, one near the top of the pillar 

 lip, and the other not quite halfway down, both of 

 them approaching each other as they recede inwardly ; 



