395 



the lower part reflefting much, forming a confiderable 

 linear cavity, or fub-umbilicus : no teeth. Length five- 

 eighths of an inch, or rather more ; breadth a quarter. 



This fhell fometimes varies to horn-colour, and cine- 

 reous, but mofli commonly of a rufly, or rufous-brown. 

 It appears to be rare, or at lead a very local, nonde- 

 fcript fpecies. 



We firft found it in a moid wood at Lackham in Wilt- 

 Jliire, in one fmall fpot only, adhering to the trunks of 

 afh and hornbeam trees ; and afterwards tolerably plen- 

 tiful in the woods belonging to the Marquis of Lans- 

 DOWN, at Boto Wood, in the fame county, not very dif- 

 tant from the former place ; and in no other part. 



It feems to be a long time arriving at maturity, for 

 fcarce one out of ten has the mouth perfeftly formed. 

 In its infant flate, when it has only four or five fpires, 

 it has much the appearance of a conic Trochus ; and the 

 aperture is fomewhat quadrangular. 



It has much the habit of//, ohfcura, but is more than 

 double the fize of that (hell, and the exterior lip turns 

 rather more outwards. 



Animal pale, lightefl beneath ; terdanda four, cla- 

 vate : eyes placed at the tips of the longeft. 



E e e 2 Helix 



