48 HELICIDJE. 



Hab. Damp places at the roots of grass, under 

 stones, &c. It is widely diffused, but rather local. 

 This, together with the remaining members of the 

 Pupa genus, may have been overlooked on account of 

 their being so minute, and their colour so often resemb- 

 ling that of the soil, leaves, &c., on which they may 

 be found. Plentiful in many parts of Yorkshire and 

 Durham. 



P. MINUTISSIMA. Hartmann. PI. VII, fig. 9. 



Shell minute, cylindrical, dextral, a pale brown colour, wrinkled ; 

 mouth edentulous ; lips scarcely reflected. 



Pupa muscorum, Drap. Vertigo cylindrica, Gray. 



With the exception of Venetzii, this is the rarest of 

 our British Pupae. It may easily be distinguished by 

 its minute size, not measuring more than one line in 

 length, by two-fifths of a line in breadth, and cylin- 

 drical shape. Whorls five or five and a half, much 

 rounded ; suture abrupt. The animal is dark, streaked 

 with black and shining. 



Sab. There is every reason to believe this some- 

 what rare Pupa is generally diffused through the 

 British Isles. It seems partial to calcareous rocks, and 

 the debris at their base may often be searched with suc- 

 cess. The reported localities are Balmenna, Fifeshire, 

 Durdham Downs near Bristol, and Salisbury Crags, 

 Edinburgh. We have also found it pretty abundantly 

 in conjunction with pusilla, edentula, substriata, py- 

 gmcea, and many commoner shells, upon the top of the 

 magnesian limestone crags, Went Vale near Ackworth. 



P. PYGM^A. Druparnaud. PI. VII, fig. 10. 



Shell minute, dextral, ovate ; whorls four to five ; mouth with four 

 or five teeth ; peristome marginated externally. 



Vertigo pygmsea, Gray, Sfc. 



In shape and external characteristics, this little shell 

 somewhat resembles substriata, but the latter is more 

 conical, and has six teeth ; it is also rather less. The 



