Zoology. 435 



Vallonia pulchella, Miiller, Vallonia costata, Muller, Vallonia 

 excentrica, Sterk. It is doubtful if these are distinct species. 

 Found under wood and stones. Bank of Thames, 1892 (H.) ; 

 W. Wickham, 1906 (L.) ; Hayes and Beckenham, 1907 (L.) ; 

 Bromley, scarce (S.K.). 



Helieigona arbustorum, Linne. Shooter's Hill (J. and G.). 



Helicigona lapicida, Linne. Chalky hedge banks and boles of 

 beeches. More often found dead than alive in the district. 

 Bostall Wood to Belvedere, 1892 (H.) ; Shoreham, 1896 (C.) ; 

 Down and Farnborough, 1902 (L.) ; Bromley, scarce (S.K.). 



Helix aspersa, Muller. Everywhere (H., R.A.A., and S.K.) Var. 

 exalbida in several places in the district, 1892 (H.). 



Helix pomatia, Linne. Shoreham, 1896 (C.) ; Cudham, 1906 (L. 

 and S.K.), Down, Keston (S.K.) ; more common just outside 

 the district, in Surrey (H.). 



Helix nemoralis, Linne. Common, especially on chalk. Plum- 

 stead Marshes (H.) ; Burnt Ash, Grove Park, Eltham, Orping- 

 ton (R.A.A.) ; Bromley, abundant (S.K.). 



Helix hortensis, Muller. More common than the last and allied 

 species. Not usually associated with nemoralis. Both found 

 in Plumstead Marshes, but in separate parts. Var. lilacina is 

 an especially N. Kent form, and so, to a lesser degree, is the 

 form bearing only a peripheral band. At Swanley this form 

 with yellow (common), red (rare) and lilac (very rare) ground 

 colour (H.) ; Grove Park, Eltham, Orpington, common in 

 Hither Green Lane until built over (R.A.A.) ; Bromley, abun- 

 dant (S.K.). 



Ena obscura, Muller. Fairly common. Var. alba in Bostall chalk- 

 pit, 1892 (H.) ; Grove Park, Orpington (R.A.A.) ; Bromley, 

 common; Keston, Cudham (S.K.). 



Cochlicopa lubrica, Muller. Common in moss and under stones. 

 Bostall, Hayes (H.) ; Orpington (R.A.A.) ; Bromley, 

 common (S.K.). 



Azeca tridens, Pult. In similar situations to the former, but rare. 

 Keston, 1901 (L.) ; Cudham (S.K.). 



Csecilioides aeicula, Muller. Subterranean, to be looked for on 

 buried bones. Dead shells found on mole heaps and in river 

 detritus. Erith, 1893 (H.) ; Keston and Farnborough, 1901 

 (L.); near Gravesend, 1903 (C.) ; Cudham (S.K.). 



Jaminia muscorum, Linne. Under stones and in moss, Erith, 1893 

 (H.) ; West Wickham, 1906 (L.) ; St. Mary Cray (S.K.). 



