MR. ARTHUR MAYFIELD ON THE MOLLUSCA OF NORFOLK. 
VII. 
TIIK MOLLUSCA OF NORFOLK. 
By Arthur Mayfield, M.C.S. 
Read 2Jjih February , 1800. 
The following list of species and varieties of Norfolk Mollusks is 
intended to supplement the papers on the subject written by 
Messrs. J. II. Bridgman and F. W. Mariner, and published in the 
lirst volume of the Society’s ‘Transactions.’ 
With a few exceptions, which are marked with an asterisk, the 
land and freshwater varieties have already been recorded by 
Rev. S. Spencer Pearce and myself in ‘The Journal of Conchologv,’ 
vol vii. pp. 391 — 40-L A few shells which have not come under 
my own notice, but which are given on the authority of the 
Rev. S. S. Pearce, are marked (S. S. P.). The additions I am able 
to make to the marine list are the result of researches made in the 
spring of 1893, when .1 was residing at Great Yarmouth, and in 
July, 1890, while making a holiday-tour along the coast from 
Yarmouth to Hunstanton. 
*Arion minimus, Simroth. Under dead leaves. Caistor St. 
Edmund’s, Dunston, Buckenham. 
A. hortensis, For. var. grisea. Ileigham. 
Amalia sowerbyi (For.) Plentiful at Catton j Kirby Bedon. 
*A. gagates (Drap.). In gardens. Heigham. 
Agriolimax l.evis, Mull. Plentiful on marshes and ditch-banks, 
Bramerton, Postwick, Colney, Costessey. 
Hyalinia nitidula (Drap.) var. helmii (Alder). Old Lakenham. 
*H. pura (Alder). var. margaritacea (Jeff.). Under dead 
leaves. Dunston. 
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