INTRODUCTION. 15 
DAMP AND Dust. 
The great enemies of the specimens are damp and dust. The 
drawers of the cabinet should be frequently aired if the room is at all 
damp. 
Dust is more difficult to cope with, and is exceedingly difficult 
to remove thoroughly. It is drawn into even the _ best cabinets 
by currents of air caused by change of temperature, to avoid 
which the following plan has been adopted. A hole at the back of 
the cabinet is made and plugged with cotton wool and the outside is 
covered with a piece of wire gauze to keep the wool in place. The 
currents of air now cease to rush through all the smaller crevices and 
form one general flow through the ‘‘ dust trap,” leaving the dust on 
the wool, which is renewed when required. 
Mr. J. R. Hardy, of the Manchester Museum, informs me that he 
has adopted the plan of fastening a strip of velvet along the edge of 
the doors of some of the cabinets with very satisfactory results. 
LABELLING AND REGISTERING. 
As soon as possible the shells should be labelled, even the dupli- 
cates which are to be stored away to gladden other collectors’ hearts. 
Both the zame and the /ocaltty should be carefully recorded ; some 
add the date of capture. 
The collector cannot do without a register. There are various 
methods of arranging this, but the following has commended itself to 
me as the most practical :—Get a good-sized note book, keep a separate 
page for each species, with the name written at the top and the 
localities in a marginal column. I give a specimen :— 
Aseca tridens. 
Derbyshire. A few specimens found among moss at the foot of 
limestone rocks at Matlock Bridge, Sept., 1880. 
Essex. Sparsely among dead leaves, near Coggeshall. 1881. 
Worcester. Specimens received, coming from Evesham. 1881. 
Cheshire. A single specimen in moss on a wall at Marple, 
Cheshire. Aug., 1882. BLE. ELC. 
