108 PUPIDZ. 
in Wilts. It is much larger than C. volphit and more 
slender in proportion. It is, moreover, streaked with white. 
Var. xélsont ( Jeff.). More slender than type, almost 
devoid of striation and translucent. 
Sub-genus.—MArPESSA Gray. 
4. C. LAMINATA (having plates) Montagu. Pl. V., f. 3. 
Very similar in shape to the last species, but relatively narrower 
just above the mouth ; pale reddish horn-colour ; smooth and glossy ; 
microscopically striated in the line of growth; nearly transparent ; 
whorls 123 mouth ovate; teeth well marked on the columella; there 
are 3 or 4 internal laminz visible through the transparent shell; 
umorecus small; claustlium sub-oblong, with a deep notch near the 
base. A. 163mm. B. 4 mm. 
This handsome species is locally but widely distributed 
throughout England, but it has only been recorded for 
Perth in Scotland, and Glamorgan in Wales, and con- 
fined to a limited area in Ireland. 
It has the reputation for a partiality for the beech and 
ash, at the roots and on the trunks of which it may be 
found, sometimes at a great height. It occurs in great 
abundance in some places on the limestone rocks in 
Derbyshire, and in the famous Birdlip Woods. 
Var. I. pellucida ( Jeff.). Thinner, more transparent, 
highly glossy. 
Var. Il. albina (Mogq.). Clear white, sometimes with 
a greenish tinge. 
