HELIX. 3.3 



it is Carthusiana, which is much smaller ; but need 

 never be mistaken for the young of Cantiana^ since in 

 the latter case, the mouth would not be fully formed 

 until it arrived at its perfect development. About 

 three quarters of an inch in length. 



Hah. The recorded localities are " districts around 

 London, and the south of the Thames." They are also 

 found locally abundant in the south of Yorkshire, near 

 Pontefract, near Thirsk, &c., and on the banks of the 

 Tees. 



H. Carthusiana. Muller, PL YI, fig. 12. 



Shell depressed, mouth marginated, with a white band ; whitish 

 horn colour ; umbilicus small. 



Helix Carthusianella, Drap., ^c. 



It is very local, being found only on the chalky 

 downs in the south of England, where it sometimes 

 congregates in great numbers, but seldom spreads over 

 a large area. In shape and appearance it most nearly 

 resembles Cantiana, but is not half the size, flatter in 

 spire, and of a more delicately pellucid, pinkish white. 

 Diameter about three eighths of an inch. 



Hah. Chalky downs in the extreme east of Kent 

 and Surrey. 



H. NEMORALIS. LlnncBUS. PI. VI, fig. 3. 



Shell somewhat globose and depressed ; variously coloured, often 

 banded ; lip reflected, dark brown or black. 



This is one of the most variable in colour of land 

 shells, it being difficult to say what is the most pre- 

 vailing hue. It is very abundant, and may be readily 

 distinguished from the succeeding species by the colour 

 of the lip being a dark brown approaching to black, 

 while hortensis is white. 



Hab. Found abundantly in all parts of the British 

 Isles ; hedge-rows are their favourite resort. 



H. HORTENSIS. Lister. PI. VI, fig. 6. 



Somewhat globular, thin and smooth ; generally of a light yellow 

 colour, with or without bands ; lip wbite. 



This shell, unlike nemoralis, is very local. It also 

 differs from it in being smaller, not quite so convex. 



