44 HELICID^E. 



tion of the shell. Length usually about half an inch. 

 Animal yellowish, with four tentacles, upper one long. 



Hal). Extremely abundant in the west and south of 

 England, on chalk or sandy maratime pastures. It is 

 also recorded as having been found on the Isle of Man, 

 in the west of Scotland and Hebrides, and many parts 

 of Ireland. 



B. LACKHAMENSIS. Montagu. PI. VII, fig. 2. 



Shell oblong, chocolate brown colour ; mouth sub-oval. 

 Bulimus montanus, Brown, fyc. 



This fine Bulimus, which is found only in the south 

 of England, is probably, like the former species, confi- 

 ned to the chalk and limestone formations. It is one of 

 our rarest land shells, having been found in compara- 

 tively few localities. The equal coating of chocolate 

 brown colour, together with its size, about five-eighths 

 of an inch in length, and spiral appearance, readily 

 distinguish it. The animal resembles that of obscurus. 



Hal. Wooded districts in the south of England, on 

 the lime and chalk formation, frequently on the stems 

 of trees, beech trees in particular, or under decayed 

 leaves at their roots. Essex, Kent, Wiltshire, Somer- 

 setshire, and many localities near Cheltenham, are 

 recorded. 



B. OBSCURUS. Mutter. PI. VII, fig. 3. 



Shell similarly shaped to the last, but smaller ; brownish horn colour; 

 peristome white, reflected. 



Helix bbscura, GmeL, fyc. 



This shell closely resembles the preceding species, 

 but is smaller, being little more than three lines and a 

 half long ; the volutions are somewhat more rounded, 

 the mouth shorter, and peristome white. The colour 

 is much lighter and devoid of the dark brown or choco- 

 late hue. The greatest peculiarity about this shell is 

 that it envelopes itself with a coating of mud, seemingly 

 for the purpose of escaping detection ; hence its name 

 " obscurus," When it is found on the trunks of trees, 



