PUPA. 49 



peristome of pygmcea is slightly thickened and re- 

 flexed. Animal dark grey, upper tentacles small, lower 

 ones almost obsolete. 



var. ALPESTRJS, Forbes and Hanley, has only four 

 teeth, it may also be distinguished by its lighter colour- 

 ing, and more cylindrical shape. 



Hob. Widely distributed, and in some places abun- 

 dant ; under stones, decayed leaves, &c. The variety 

 has, as yet, been found only in the northern counties. 



P. SUBSTRIATA, Jeffreys. PL VII, fig. 11. 



Shell minute, dextral, striated ; mouth with six teeth (only four 

 easily perceptible); yellow horn colour. 



Vertigo substriata, Gray. Turbo sexdentatus, Mont. 



This minute shell is more conical than the preceding, 

 and longitudinally striated. The volutions, four or five 

 in number, are well rounded and rather high. It may 

 be distinguished by being the smallest of the tribe, 

 and having the two parietal teeth very perceptible. 

 Animal blackish grey. 



Hob. Like most of the other shells of this genus, 

 particularly the Vertigo section of them, it seems to be 

 widely distributed, but often overlooked on account of 

 its diminutive size, &c. Among wet moss or grass, 

 in marshy places. The principal localities in which it 

 has been found are in the north of England, but Nor- 

 folk and Devonshire are also recorded districts. We 

 have observed it among peaty soil, on magnesian lime- 

 stone rocks in the south of Yorkshire. 



P. ANTIVERTIGO. Drapamaud. PI. VII, fig. 12. 



Shell dextral, minute, shining brown, with five volutions ; mouth 

 trigonally lunate, with from seven to nine teeth. 



Vertigo palustris, Gray. 



This beautiful little Pupa is easily distinguished from 

 the rest ; firstly by its shining dark chocolate colour, 

 with the extreme margin of the aperture whitish ; 

 secondly by its teeth, three of which are very promi- 

 nent and easily perceived, they are of unequal size ; 



