126 THE ZOOLOGIST. 
search for it is necessary. In appearance the shell is not very 
unlike Pepa, but more transparent, with fewer whorls and with the 
spire less blunted. Mr. Unwin notes it as rare in the neighbour- 
hood of Lewes. He las found it at the roots of moss (Hypnum 
lutescens and cuspidatum), on a moist bank sloping towards the 
“ Cut,” near Landport. 
Mr. Borrer would include amongst the Land and Freshwater 
Mollusca of Sussex, Conovulus denticulatus and C. bidentatus, 
which he notes as occurring in brackish marshes under stones and 
amongst roots, and abundant around Newhaven and near Shoreham 
Bridge. Mr. Gwyn Jeffreys, on the other hand, considers that 
they should be “excluded from the category of land shells, and 
placed with those having a marine habitat.” The late Dr. Gray, 
in his edition of Turton’s ‘Manual of the Land and Freshwater 
Shells of the British Islands,’ places these two species in the same 
family (Auriculide) with Carychium minimum, and remarks :— 
“These Mollusca appear by habit and character to be exactly 
intermediate between the land and freshwater univalve Mollusca. 
They have the sessile eyes of the Pond-snails, placed behind 
instead of in front of the tentacles of the land-snails; but the 
tentacles are not retractile under the skin of the neck. In the 
same way the Carychia and Acmea are terrestrial, living in damp 
moss; the Conovuli live in the mud at the mouths of rivers, or in 
the sea—they seldom leave salt, or at least brackish water.” 
Fam. CYCLOSTOMATIDA. 
Cyclostoma elegans. The Elegant Circle Shell.—In hedges and 
under stones on the chalk. Abundant in the copses under the 
South Downs. The mouth of this shell is closed with a very solid 
operculum, covered on both sides with a thick epidermis, a double 
fringe of which completely encircles it, and causes it to appear 
laminated. The animal itself is of very shy and retiring habits, 
and in dry weather buries itself in the earth, where it often falls 
a prey to carnivorous beetles, notwithstanding its closely-fitting 
operculum, 
Acme lineata. The Striated Pointed Shell.—Amongst decayed 
leaves in open drains, and under stones in woods. lucluded in the 
‘ lists from Brighton and Lewes (where Mr. Unwin marks it as rare), 
yi under the name Segmentina lineata. 
(To be continued.) 
