10 INTRODUCTION. 



on cotton wool, carefully labelled, have a very attractive 

 appearance in a collection. 



The shells of most slugs are covered by the mantle, under 

 which the blade of a penknife or scalpel should be inserted 

 to effect their removal. Many prefer to kill the animals 

 first in boiling water, and this method recommends itself 

 both on the score of humanity and convenience. The shells 

 thus extracted may be gummed on to slips of black card. 



Labelling^ and Registering. 



As soon as possible the shells should be labelled, even if 

 they are duplicates, to be stored away for exchange. Both 

 the name and locality should be most carefully recorded. 



The collector will do well to keep 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 : 



Cochlicopa tridens. 



Matlock. A few specimens found among moss at the foot of 



limestone rocks at Matlock Bridge. Sept., 1880. 

 Coggeshall. Sparsely among dead leaves. 1881. 



Evesham. Specimens received, coming from Evesham. 1881. 



Marple (Cheshire). A single specimen in moss on a wall. Aug., 1882. 



&c., &c. 



There should be some spare pages at the end of the 

 register for occasional notes. For instance, after a district 

 has been well worked, a list of all species found in it 



