Reports of Societies. 



75 



fishes trout and stickleback, both in Malham Tarn. On behalf of the 

 secretary of the Conchological Section (Mr. J. Darker Butterell) and 

 himself, who had been working the Tarn during the afternoon, Mr. W. 

 Denis.on Roebuck reported that they were very well satisfied with the 

 result of their investigation, although time had not permitted of the 

 examination of more than about a third part of the Tarn. The fauna 

 proved to be somewhat richer than might have been expected from the 

 height of the Tarn above sea-level (nearly 1300 feet), and several of the 

 species found exhibited interesting tendencies to variation. One of the 

 most interesting was "^Limnsea stagnalis. var. fragilis, sub-var. variegata, 

 the second time of its occurrence in the British Isles. It was abundant 

 on Potamogeton lucens. Others were "^Sphserium corneum, var. nucleus 

 (common), Pisidium pusiUum (common), *Valvata piscinalis (a few, 

 approaching var. acuminata in form), *Bythinia tentaculata (dead shells), 

 *Planorbis nautileus (one specimen), PI. contortus (very abundant, 

 though small in size ), *Limn8ea peregra var. ovata (dead shells). Under 

 logs of wood close to the margin of the Tarn were specimens of Limnsea 

 truncatula var. minor, and a dwarf form of Succinea putris, together 

 with two species of slugs, *Limax Jsevis and Limax agrestis. On the 

 river Aire, where it issues from the Cove, were found specimens of 

 L. peregra var. ovata, and Ancylus fluviatilis var. albida ; several of 

 these were additions to the recorded fauna of the district. To land-shells 

 not much attention was paid during the day, as this branch of the fauna 

 is comparatively well known, whereas of the freshwater forms of the Tarn 

 absolutely nothing whatever had been recorded, The list of land-shells 

 included Arion ater, Zonites crystallinus, Z. alHarius, "^Helix aspersa, 

 H. nemoralis, H. arbustorum and var. pallida, H. hispida and var, sub- 

 rufa, H. sericea, H. rufescens, H. rotundata, H. rupestris, Clausilia 

 rugosa and var. dubia, Pupa umbilicata, and Cochlicopa lubrica. The 

 species and varieties marked with the asterisk (*) are new to the district. 

 The total number of forms observed was 31. In Entomology Mr. G. C. 

 Dennis (in the temporary absence of the secretary of the section, Mr. 

 E. B. Wrigglesworth), reported as follows : — Yery limited was the 

 time which we were able to devote to the entomology of the 

 district. Our route lay from Settle by way of Victoria Cave to 

 Malham Tarn and Cove, and we did not leave the Old Town until 

 one p.m. We did, however, by dint of hard work and much scheming, 

 manage to secure about 24 species of coleoptera — none of them 

 unknown, though many not common. Had an entomological party been 

 formed, and confined their attention to Malham and the district about a 

 mile round, we should have had more to record. The following are the 

 coleoptera taken during the day's excursion : — Cychrus rostratus. Linn. , 

 near Victoria Cave ; Nebria complanata. Linn., above Victoria Cave ; 

 Lebia cyanocephala, Linn., Malham Cove ; Patrobus excavatus, Payk., 

 Settle ; P. assimilis, Chd., Malham ; Hydroporus picipes, Fabr., Malham 

 Tarn ; Colymbetes pulverosus, St., Malham Tarn ; Acilius sulcatus, 



