It has been suggested that a list of the non-marine Gastropoda which have been recognised as British since the publication of British Snails, with references to descriptions, would be useful to collectors. This does not include mere changes in nomenclature, most of which are in the last edition of the Census of the distribution of British non-marine Mollusca (J. Conch., 231 171-244 1951) Acicula Hartmann replaces Acme, and Viviparus contectus (Millet) replaces V. fasclatus (Muller), returning to the usage of the earlier authors. For slugs, reference should be made to two publications by Dr. H. E. Quicks 1. Linnean Society Synopses of the British Fauna, No. 8. Slugs (Testacellidae, Arionidae, Limacidae), 1949 s cold by the Linnean Society, Burlington House, Piccadilly, London, W.I., price 2/6d. net. 2. Bulletin of the British Museum (Natural History), Zoology, vol. 6, No. 3 British Slugs. i960, price 45/— . The freshwater species are briefly described and illustrated in Freshwater Biological Association Scientific Publication No. 13. A key to the British fresh- and brackish-water Gastropods, by T. T. Macan and R. D. Cooper, 1949 price 2/- , sold by the F.B.A., The Ferry House, Far Sawrey, Ambleside, Westmorland.
The following are the recently added species, exclusive of introduced aliens found chiefly in greenhouses, and species only knoY/n as fossil in the British Isles.
Carychium tridentatum (Risso): mentioned as a variety of C. minimum in British Snails. Watson, H., and Verdcourt, B., 1953, The two British species of Carychium, J. Conch. 23: 306-324, pls. 9, 10.
Catinella arenaria (Bouchard-Chantereaux) : Quick, H. E., 1933, Anatomy of British Succineae, Prop. Malac, Soc. Lond., 20| 295-318, pl. 23-25.
Cochlicopa lubricella (Stabile): Quick, H. E, 1954, Cochlicopa in the British Isles, Proc. Malac. Soc. Lond., 30s 204-213? pi. 19.
Arion lusitanicus Mabilles Quick, H. E., 1952, Rediscovery of Arion lusitan- icus Mabille in Britain. Proc. Malac. Soc. Lond., 29* 93-101.
Arion rufus (L.) mentioned as a variety of A. ater in British Snails, now regarded as a subspecies. Quick, H. E., 1947, Arion ater (l.) and A. rufus (L.) in Britain and their specific differences, J. Conch., 22s 249-261.
Vitrea contracta (Westerlund), Kuiper, J. G. J., 1948, Over het voor komen van Vitrea contracta Westerlund in het Haagse Bos. Basteria, 12: 28-33. Figured in Taylor, J. W. , 1908, Monograph of the land and freshwater Mollusca of the British Isles, 3: 113, fig. 153. Regarded as a variety of V. crystallina in British Snails.
Milax insularis (Lessona and Pollonera): Quick, 1960, 156.
Milax budapestensis (Hazay), Phillips, R. A., and Watson, H., 1930, Milax gracilis (Leydig) in the British Isles, J. Conch., 19: 65-93, pls. 1, 2.
Agriolimax agrestis (L.), as distinct from A. reticulatus (Mtlller), and A. caruanae Pollonera: Quick, 1949 and 1960.
Hygromia cinctella (Draparnaud), Comfort, A., 1950, Hygromia cinctella (Draparnaud) in England, J. Conch., 23: 99-100.
A. E. Ellis