HELICID.K. 177 



with a slight tinge of green; aperture crescent- 

 shaped ; umbilicus deep and rather large. 



It may be known from the young of any of the 

 former species by its watery transparency, and by the 

 number and regularity of its volutions, which increase 

 in a gradual proportion, not having the outer one 

 much larger than the rest. 



This common shell was first recorded as British in 

 the Medical Repository for 1821. 



6. SUCCINEA Drap. (Amber Snail.) 



The animal with a large gelatinous foot, short in- 

 flated tentacles, and an oblong spiral body, lying 

 on the upper part of the foot ; body covered with 

 an oval, oblong, thin shell, with a short conical spire, 

 and rapidly enlarging whorls, ending in a large 

 longitudnal oblique mouth, with the peristome dis- 

 united behind ; pillar smooth, and with an imper- 

 forated axis. 



This genus is easily known from Helix and Zonites 

 by the oblong shape ; and from LimrKBUs, with which 

 the older conchologists often confounded it, by there 

 being no appearance of any oblique fold on the pillar. 

 Montagu justly observes that the animal, like 

 the other Limaces possessing four tentacula, is herma- 

 phrodite, and sometimes unites as late as the month of 

 August. (Test. Brit. 398., and Sup. 139.) 



If is named from the transparent amber colour of 

 its shell. 



They are found in damp marshy places on the mud, 

 water-flags, &c., but are scarcely to be considered as 

 amphibious, for they are never found in the water, 

 like the Limn&i or Pond snails. 



i 5 



