Yorkshire Nafuralisis a' MLilhat 



?>?>7 



of the freshwater Limpet [Ancylus fliiviaiilis), alst) Sphccrium 

 corneiiin \'ars. nitclcits and flavescens ; and Planoylns contorius. 



Exclusive of the above-mentioned Pisidia, ten species were 

 noted as inhabiting this sheet of water. Taking into considera- 

 tion the size and coiuhtion which they reach on arrival at 

 maturity (and in some instances they rival in size the same 

 species which occi:r in the valley bottoms), the molluscan 

 fauna of this mountain tarn is astonishing seeing that it is 

 situated at over a thousand feet in altitude. 



A number of interesting land shells were also noted, \az. : — 

 Hyaliniaradiatula, Helix nemoralis vdiV .albolahiata (i specimen), 

 Ena obscnra, Clausilia cravenensts, etc., and amongst the slugs, 

 Limax ayboyum, Agi'iolimax Icevis, Avion intermedins, etc. The 

 parts investigated for land shells were the wood near Tarn 

 House, the screes above the wood, and the boggy ground south 

 of the Tarn. The total number of land species noted was 

 thirt\'-three, including eight slugs. 



LIST OF SPECIES. 



Land Shells. 



\'itriiui pellucidu. 

 Hvdliiiiii cvystalliua. 



,, celhiria. 



,, alliavia. 



,, nitidula. 



,, puva. 



,, yddiaiula. 



,, iiitidus. 



,, fiilvus. 

 Punctum pygmceum. 

 Pyramidula rotund at a. 

 ,, ntpesti'is. 



Hygvomia hispida. 



,, viifescens. 

 Helicigona arbustoyitni. 

 Helix nemoralis. 

 Ena obscnra. 

 Cochlicopa lubrica. 

 Pupa cylindracea. 

 Bale a perversa. 

 Clausilia bidentata. 



,, craveneusis. 

 Succinea putris. 



,, elegans. 

 Carvchium miiiiriuDii. 



Slugs. 



Limax arborum. 

 Agriolimax agrestis. 



,, Icevis. 



Arion ater. 



,, subfuscus. 



,, interniedius. 



,, hortensis. 



,, circumscriptus. 



Freshwater Shells. 



Liinncsa pereger. 



,, truiicatula. 



,, palustris. 



,, stagnalis. 



Plauorbis albus. 



,, contorius. 



Bithynia teniae ulata. 

 Vcdvata piscinalis. 

 Ancylus fluviatilis. 

 Sphcsrium corneum. 

 Pisidium fontinale. 



,, pusillum. 



,, nitidum. 



Botany. — Mr. J. Beanland writes : — In a district so classical, 

 worked by so many eminent botanists for the last two hundred 

 years, it would be marvellous to have done more than record 

 the known and e.xpected. Everyone seemed satisfied to see 



1910 Sept. I. 



