4334 Mollusks. 



Zonites crystallinus. Rather common. 

 „ purus. Less frequent than the last. 



Succinea putris. Well distributed, but usually of small size. 



Bulimus obscurus. Generally diffused, but not abundant ; I have 

 found a few beautiful specimens of the transparent, almost colourless 

 variety. 



Zua lubrica. Common. Albino var. chalk-hills about Kemsiug ; 

 rare. 



Azeca tridens. One locality, and there not plentiful ; near Stan- 

 sted, among moss upon a chalky soil: of this also I possess one 

 albino specimen. 



Achatina acicula. A few localities, but rare. 



Pupa umbilicata. This shell, abundant in other districts which I 

 have examined (especially near St. Leonard's), is here rare ; as yet I 

 know but one locality, — the Vine Lodge, where it was shown me by 

 Alfred Northey, Esq. 



„ marginata. Rare ; found by Lady A. Pratt, at MarantVcourt 

 Hill. 



„ pygmaea. Rare ; Knole Park, and single specimens in 

 two other localities. 



„ palustris. Moss near the Darent, not common ; I have found 

 specimens attached with other shells to the cases of caddis worms. 



Balea perversa. Rather frequent on decaying beech -trees in 

 Chance Wood, Wildernesse Park. 



Clausilia bidens. Well diffused, but not generally abundant ; 

 most frequent on the chalk at the roots of hedges, &c. I have taken 

 a few fine examples of the greenish white variety. 



„ Rolphii. This rare shell is found in two localities in 



Wildernesse Park, but the most diligent search has yielded very few 

 specimens : I obtained it at Hastings, as indicated by Gray ; and 

 possess several from Ashurst Park, Tunbridge Wells, collected by H. 

 Field, Esq., jun. 



„ nigricans. Common ; one curious reversed specimen has 



been found in this district. 



Carychium minimum. Abundant. 



Acme fusca. Quarry near Wildernesse ; very rare. 



Lymna:us pereger. Common. 



„ „ var. acutus. Occasional. 



„ „ var. lacustris. Near the Darent ; T also obtained 



it near St. Leonard's-on-Sea. 



