Yorkshire Naturalists at Giiisborough. 395 



CoNCHOLOGY. — For the Conchological Section there was no 

 report given at the Saturday's meeting-, all the work being done 

 during the two following days. The President of the Section, 

 Mr. Wm. Denison Roebuck, F.L.S. , spent a day with the 

 mycologists in the pretty little ravine down which a clay- 

 coloured stream ran through Waterfall Wood. Commencing 

 at the point where the ravine is crossed by the road to the East 

 Coast, operations were at once begun. A colony of remarkably 

 young examples of Ariou circiimscriptiis was noted ; they were 

 about 3 mm. long, with the central keel or back-ridge very 

 noticeable. Liinax arboriim of almost vuiiform pale colour was 

 found on a branch, and another under a piece of canvas thrown 

 down in the wood. Then were seen a colony of Coclilicopa 

 lubrica, numerous examples of Clausilia bidentata, and of 

 Hvali)iia alliaria, a few Hyalinia piira, one or two small Agrio- 

 limax agrestis, a very minute Arion hortensis, and by the side of 

 the stream an equally small Agrioliniax Icevis, on pieces of stick 

 one or two Acanthinula acideata and a single Piinctum pygmcBiim, 

 and numerous Vitrca crystallina. A halt for lunch was made 

 on a bank-slope overlooking the Skelton Shaft ironstone-mine, 

 where a log being turned over yielded numerous Pyraiiiidula 

 rottijidata, some typical Agtiolimax agrestis, and quite a colony 

 of small Arion hortensis. Further down the course of the 

 ravine occurred a young example of the typically marked Limax 

 maxitniis, and under stones by a gate an example of Asecu 

 iridens. A small plain under some beeches repaid some 

 'gravelling,' as the fallen beech-leaves yielded great number of 

 CaryciiiiiDi niiiiiniuni, Vitrea crystallina^ Arion miniiniis^ etc. 

 Hygromia hispida was collected during the day. At an early 

 hour the mycologists found they had collected as much material 

 as they had time to examine, and all returned to Guisborough. 

 The conchologists went out again, this time to a point on the 

 same ravine about a mile further down stream. Here were 

 park-like fields bordering the rivulet, with fine trees. Pyrami- 

 diila ?'otiindata and Clausilia bidcntata occurred here, and there 

 was great abundance of Boletus Jlavus, on most of the specimens 

 of which Anon niininius was feeding freely. 



On the Monday the whole of the same party, reinforced by 

 a couple of geologists, drove to Kildale to investigate the 

 woods there, which were found so productive to the Union 

 some years ago. The conchological party was here strengthened 

 by Mr. Baker Hudson, who had cycled over. The party at 

 once commenced investigations, settling down to begin with in 



J906 November i. 



