carpenter: molLUsca from chalk-pit. 2t7 



shells of H. lapiciaa, but have not yet come across a living specimen. As yet only 

 three species of slugs have been found, and no species of Pupa or Vertigo. 

 (i) Vitrina pellucida. — Plentiful in the nettlebed. 



(2) Agfriolimax agrestis.— Plentiful everywhere. 



(3) Vitrea cellaria. — Plentiful among herbage and in the nettlebed. 



(4) V. rogersi. — Plentiful among herbage and in the nettlebed. 



(5) V. alliaria.— Not at all plentiful. 



(6) V. nitidula. — Plentiful among herbage and in the nettlebed. Both type and 

 var. niiens; also a few much paler specimens. 



(7) V. pura. — Both type and var. nitidosa extremely plentiful in the nettlebed. 

 Grows to a large size. 



(8) V. radiatula. — Several specimens from the. nettlebed, and at roots of grass. 



(9) Arion hortensis. — In the nettlebed, 



(10) A. intermedius. — Among dead leaves. 



(11) Punctum pygmaeum. — Under fallen blocks of chalk. 



(12) Pyramidula rotundata. — Very plentiful. I have taken two subscalariform 

 specimens and several var. alba. 



(13) Helicella virgata. — Curiously enough I have only found two small empty 

 shells of the type, and two very small abnormal specimens approaching var. lutescens. 



(14) H. caperata. — Very plentiful on the short grass. They are of a greyish- 

 brown colour with an interrupted peripheral band. Var. fiilva is quite plentiful and 

 I have found one empty shell only of var. omata. In the autumn this species ascends 

 the withered brown flower stalks of the wild parsnip and rests there; the fulvous 

 variety is then especially well protected by its colour which closely approximates to 

 the brown of the dried flower stalks, so that the shell is practically invisible from a 

 little distance. 



(15) H. cantiana. — A few specimens only, darkly coloured with a white 

 peripheral band. 



(16) Hygromia hispida. — Plentiful, both type and var. hispidosa. 



(17) H. rufescens. — Very plentiful, and grows to a good size, showing consider- 

 able variation in altitude. In colour the specimens vary from a deep red brown to 

 a pale horn colour with a white peripheral band. Var. alba also is found. 



(18) Acanthinula aculeata. — Several among dead leaves in the nettlebed. 



(19) Vallonia pulchella. — Plentiful among the grass roots, but of small size. 



(20) V. costata. — Among the grass roots. 



(21) Helix aspersa. — Among the ivy. 



(22) H. potnatia. — Several fine specimens in early summer. 



(23) H. hortensis. — Type, var. /w/^a, and a specimen approaching var. arenicola. 

 Also an anomalous variety approaching var. roseo-zonata. 



(24) Ena obscura. — Plentiful and of good size. 



(25) Cochlicopa lubrica. — Very plentiful and large; both type and var. hyalina. 



(26) Clausilia bidentata. — Plentiful in the nettlebed and amongst ivy. They 

 are rather shorter than typical specimens. 



(27) C. rolphii. — This rare species is extremely abundant in the nettlebed, 

 especially in early summer and in autumn. 



(28) Carychium minimum. — Not as plentiful as one might expect. 



(29) Pomatias elegans. — Plentiful, but only seen in quantity in early summer. 

 Type and var. ochrolcuca. — G. D. H. Carpenter (A'tfaa'^if/i?;-^ the Society, February 

 1 2th, 1908). 



