CH. VIl] SNAILS AND SLUGS 243 



genus Ccecilioides (Hermans), acicula (Mull.), " x ^Y', 5i whorls, 



compressed and drawn out. Roots of trees and under stones ; 



usually buried ; never crawls on surface, 

 genus Cochlicopa (Fer.) Risso, whorls from 6 to 8, lubrica (Miill.), 



J", aperture of shell without teeth or folds, 

 genus Azeca (Leach), aperture pyriform with teeth or folds upon 



its rim, tridens (Pult.). In moss, decayed leaves, etc., at foot 



of hedgerows. 



Family ENID.E. 

 genus Ena (Leach), shell long and spiral, aperture oval, umbilicus 



small. 

 montana (Drap.), |", whorls 6^ or 7, umbilicus oblique and deep, 



S. and W. counties only. 

 obscura (Miill.), ^", whorls 6^, umbilicus narrow, not deep ; shell 



golden-brown, thin and translucent. 



Family VERTIGINID.E (PUPID^E). Shell cylindrical or oblong, occa- 

 sionally furnished with internal lamellae ; whorls numerous, 

 narrow, last whorl no broader than the preceding ; aperture 

 generally with one or more teeth, 

 genus Jaminia Risso, Pupa (Drap.), aperture of shell oval or 



lunate. In moss on stones, tree branches, etc. 

 muscorum (L.), f", aperture with one tooth, white rib behind 



outer lip, suture deep. 

 cylindracea (Da Costa), gY'j aperture with 1 tooth, suture shallow 



and oblique. 



anglica (Fer.), ^", aperture with 5 folds. 

 secede Drap., -g-", aperture with 8 or 9 teeth, 2 or 3 'on pillar, 2 on 



pillar lip, 4 inside outer lip. 



genus Vertigo Miill., aperture of shell more or less angular. On 

 old walls, under stones and among grass roots. 



(1) SHELL SINISTRAL. 



angustior Jeff., jY', teeth 4 or 5, aperture triangular. 

 pusilla Miill., %", teeth 6 or 7, aperture square. 



(2) SHELL DEXTRAL. 

 (a) No teeth. 



minutissima (Hartmn.), ^", striations distinct. 



162 



