LAND AND FRESHWATER MOLLUSCA OF SUSSEX. 93 
especially in the numerous rib-like stria which hoop round each 
whorl. Very common on the Downs in autumn, and said to yield 
“a very fattening nourishment” to the sheep, which pick them up 
with the short grass to which they cling.—H. This snail is very 
partial to clover-fields, and is a favourite morsel with the Land- 
rail—B. It is most active, and therefore more generally noticed 
after rain.—H. 
Helix ericetorum. The Heath Snail.—Abundant on the chalk, 
to which, in Sussex, it appears to be confined. The flat shape of 
the shell, its large umbilicus, and nearly circular mouth readily 
serve to distinguish it from any other of the banded snails. 
The village children in Sussex collect them by bushels, and 
threading them on strings, make necklaces and bracelets of 
them. Mr. W. Jeffery has remarked that ertcetorwm attains a 
larger size in the valleys on the north side of the Downs, where 
the herbage is less scanty than on the south side, and the sun has 
less power. 
Helix rotundata. The Rounded Snai].—Common under chalk- 
stones, dead wood, ‘and bark of old trees, as well as in moss and 
among dead leaves. 
Helix rupestris. The Little Wall Snail.—Found on rocks, walls, 
and ruins, as well as under stones on hill-sides. Rare in Sussex. 
Specimens found on the north side of the churches at Horsham 
and Keymer, and on an old wall at Lewes.—B. 
Helix pygmea. The Pigmy Snail.—Abundant under stones on 
the South Downs, and sparingly under dead wood and _ leaves in 
the neighbourhood of Cowfold.—B. Not very common near Lewes, 
but found with other minute land-shells at the roots of grass and 
moss, principally Hypnum purum and lutescens. 
Helix pulchella. The White Snail—Not uncommon under 
fragments of chalk in Uppark and on East Harting Down.—W. 
and H. Plentiful on the Downs by Lewes, at the roots of grass 
and moss, and on the east bank of Ashcombe plantation.—U. On 
old walls, amongst old mortar and heaps of stones, about Horsham, 
Cowfold and West Grinstead.—B. Found also in the neighbour- 
hood of Brighton (M) and at Eastbourne (G). 
Helix lapicida. The Rock Snail.—About the size of ericetorum, 
but much more solid, lens-shaped, of a dark brown colour, and with 
a sharp edge or keel round it, which distinguishes it at once from 
all others of its kind. The crevices of rocks and old walls are 
