1 64 HELICID^. 



striae \ periphery rounded ; epider7ms thin ; whorls 4|— 5, gradu- 

 ally increising, considerably swollen, the last two of equal 

 breadth ; spire produced and tapering, apex obtuse ; suture 

 very deep ; mouth wide, approaching to semi-oval, or somewhat 

 triangular, with a sinuation or contraction in the middle of its 

 outer margin, teeth six or seven, two on the base of the 

 penultimate whorl, of which the inner one is the most pro- 

 minent, two or three on the pillar, and two inside the outer lip ; 

 or if, as is sometimes the case, there are three, the third or 

 lowest tooth is much smaller than the others ; outer lip thickish, 

 slightly reflected, and furnished inside as well as outside with a 

 strong, yellowish-white coloured rib ; inner lip slightly thick- 

 ened ; umbilicus small, and contracted by a somewhat acute 

 basal rib. 



Inhabits woods, among moss and dead leaves, and 

 under stones, in many parts of England, as well as in 

 the north and west of Ireland, but it has not hitherto 

 been noticed in Scotland, and it is a very local species. 

 It is a timid and inactive little creature, and when 

 crawling carries its shell in an upright position. This 

 and the next (V. angtcstior) may be distinguished 

 from all the other species of Vertigo by the sinistral 

 or reversed form of the shell. 



7. V. angus'tior,* Jeffreys. Pl. IX. 



" Body short and stumpy, blackish in front, and greyish on 

 the sides and underneath ; tubercles indistinct ; ;;m;///.? yellowish- 

 grey ; tentacles thick, somewhat cylindrical, dusky-grey, con- 

 siderably diverging from each other, bulbs scarcely distinct; 

 foot thick and narrow, pale grey." — B.C., vol. i. p. 265. 



Shell narrower than V. pusilla, somewhat spindle-shaped, 

 semitransparent, glossy, pale horn-colour, with strong, oblique, 

 close-set transverse stride ; periphery compressed, slightly angu- 

 lar ; epidermis thin ; whorls 42, somewhat convex, a little 



* Narrower, 



