PAN'NEI.I, : THI', LAXP A\D FRKSHWATKR ?iIOLlATSCA OF SURREY. l/f) 



Briefly summarising these observations it will be noted that the 

 most thoroughly worked districts are numbers i, 2, 8, 9 and 10, and 

 that numbers 3, 4, 6, 7 and 11 present very poor results. From 

 district 5 I have no returns and the neighbourhood of Egham, 

 Chertsey, etc., would appear to have been unworked or perhaps by 

 collectors to whose notes I have not had access. The slugs have 

 had very scanty attention — the Arionidae are reported for three 

 districts only (8, 9 and 10); the LimacidiK iox five districts (2, 6, 8, 

 9 and 10); and the Testacellid?e for only one district (9). Variation 

 has had but limited consideration, but that is ground upon which a 

 great number of conchologists tread tenderly and with caution. 

 Haslemere, December gth, igoi. 



Report on the Guide Bridge and Dukinfield Ramble, Sept. 7th, 1901. — 



This ramble proved a very satisfactory one in every respect, the weather being 

 exceedingly fine. The district worked was from Guide Bridge along the canal 

 to Dukinfield. The canal at the former district was in an extremely dirty condition, 

 being thick with grease and iron rust, which does not, however, prove detrimental 

 to molluscan life, for Pkysa heterostropha (Say), one of the attractions of this ramble, 

 was extremely abundant and very fine, thriving fairly well along the walls. Plan- 

 orbis dilatatiis was unfortunately out of season, though it was common enough 

 in this locality in the early part of the year. Hyalinia nitida^ the only land shell 

 taken, occurs along the canal walls, just above the water. On rounding the canal 

 at Dukinfield, the water became a little purer, and further along, it was exceedingly 

 clean, and Limni2a stagnalis and /-. peregra occurred here in profusion, some of 

 them being remarkably fine, especially the latter, which were very large, some of 

 the animals being of a bright yellow colour, contrasting strongly with the olive 

 green colour of others. Another curious fact about them was, when picked up out 

 of the water, they did not retreat within their shells, as usual, but remained 

 extended. To all appearance the shell seemed too small to contain the whole 

 animal. We were successful in obtaining many specimens of Paludestri)ia jenkinsi 

 and P. taylori. Whilst collecting in this spot about a week previously, I was 

 fortunate in finding a remarkable Linincea, and was again successful in obtaining 

 another specimen during this ramble. I submitted the first specimen to Mr. Wm. 

 Nelson, who examined it, in conjunction with Mr. J. W. Taylor, and thought it 

 much resembled Liinncea bitUmoides (Lea), an American species. They were, 

 however, of opinion that at present it would be unwise to consider it as another 

 "introduction." The following species were taken during the afternoon : — 



Limnaa stagnalis (I/. ). 

 L. peregra (Miill. ). 

 Z. palustris (Miill.). 

 L. aiiricularia (L. ). 

 L. hulimoides (Lea) ? 

 Planorbis cometis (L. ). 

 P. carinaliis (Miill.). 

 P. vortex (L.). 

 P. albus CL.). 



Spharium corneum (L. ). 

 .S. pallidum (Gray). 

 Phyia heterostropha (Say). 

 P. fontinale (L. ). 

 Bythinia tentaculata (L.). 

 Valvata piscinalis (Miill.). 

 Palndestritia Jenkinsi (Smith). 

 P, taylori (Smith). 

 Hyalinia nitida (Miill. ). :. - 



J. W. Jackson {Read before the Society, October 9th, 1901) 



