214 PNEUMONOBRANCHIATA, 



* * IPHIGENIA Gray. 

 Clausium entire at the top ; shell corrugated. 



79. 2. CLAUSILIA Uplicata. Folded Close Shell, 

 (t. 5. f. 55.) Shell ventricose, opake grey-brown, 

 with regular raised striae ; aperture with two 

 plaits, the margin detached all round. 



Turbo biplicatus. Mont. p. 361. 1. 11. f. 5. 



Clausilia ventricosa. Drap. p. 71. t. 4. f. 14; 

 Jeffreys, Linn. Trans, xvi. 354. 



Clausilia biplicata. Leach, Mollusc, p. 120. 



Clausilia Montagui. Gray, Ann. Phil. 13. 



Helix perversa, adult. Muller, Verm. ii. 118. 

 Cochlodina ventricosula. Feruss. Tab. 63. 



Clausilia similis. Charp ? Rossm. Icon. 177. t. 2. 

 f. 30? 



Cochlodina similis. Ferussac ? 



In woods and close hedges. 



Animal dark grey. 



Shell nearly three quarters of an inch long, dark 

 grey, opake, 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 half way down, both of 

 them approaching each other as they recede inwardly ; 

 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 



