Proceedings. tt 
operculated terrestrial molluscs *, twa as we remember being 
the Greek for cover or operculum. 
P. reflecus has an extensive range in geological time and 
occurs in all deposits from Pleistocene up to Recent. 1 was 
fortunate enough (or rather Mrs. Bullen) to find one specimen 
in the Pleistocene at Portland Bill in 1894 fT. 
Cecilianella acicula, Mill., is one of our most interesting 
snails. The shell looks like a fragile piece of Venetian glass. 
The animal, as its name implies, is blind, being subterranean 
in habit. Its needle-like shape with rounded apex enables it 
to descend into the earth along worm-burrows and along the 
line of roots. It is carnivorous and probably hunts for its 
food by smell alone, which, as in H. pomatia, H. aspersa and 
other molluscs, is very acute. Where it abounds there appear 
to exist no underground fungi or other vegetation, and like 
Glandina (a carnivorous form) there is the same notch or 
truncature at the base of the shell +. 
C. Rolphii, Gray, which is a very rare and local form now, 
but seems to have been plentiful in Pleistocene times, occurs in 
the Reigate deposit. It occurred in a very circumscribed spot 
in my old parish in Kent (Shoreham) about 450 feet above the 
sea. I have not been fortunate enough to discover it living at 
Reigate, though there look to be likely spots in Gatton woods 
where it might be found among the beech trees, With 
HI, obvoluta, H. arbustorum, and Buliminus montanus it seems to 
be dying out. 
Buliminus montanus, Drap., is the important find in the 
Horseshoe deposit. It used to be known as the “Glory of 
Wilts,” Bulimus Lackhamensis. It has been recorded from 
Southern and Western counties, and is especially plentiful in 
Birdlip Woods, Gloucestershire. It dates back to Pleistocene 
times, occurring in the Barnwell and Grantchester gravels. It 
now frequents the trunks of beech, sycamore and ash. 
B. obscurus, Miill., a much smaller and an allied form, is 
* The other is Acme lineata. 
t Geol. Mag. 1894, p. 482. 
{ L. HE. Adams, British L, & F, W. Shells, p. 111. 
