366 Blackburn : Mollusca of Driffield and Neighbour hood. 



C-^ciLioiDES ACicui A has been taken by Miss Piercy in a chalk pit at 

 Tibthorpe, July 1904. 



Jaminia axglica we have taken twice at Flamborough Head. 



Jaminia CYLiNDRACEA. Hornsea, Wansford Road, Driffield, and Tibthorpe. 



Jaminia mtscorum. On Wansford Road and at Tibthorpe. 



\"ertigo pyg.m.e:a we have only taken in Tibthorpe. Mr. Fetch secured 

 one at Kelleythorpe. 



Vertigo antivertigo. Kelley thorpe, taken by Mr. Fetch. 



Clausilia have been found by us only at Croom, Sledmere, and York Dale. 



Clausilia laminata and Cl. bidentata are both found. 



I do not understand the scarcity of Clausilia in the district. \n 

 a similar district on the chalk hills of Bucking-hamshire they abounded 

 on the beech trees. I ha\e looked on beech trees all through the 

 district but found none except near Sledmere. This fact wants 

 investig-ating. 



SucciXEA elegans is common along- the canal bank, and in streams and 

 ponds in the neighbourhood. We have taken it fairly g-enerally. Some 

 of the finds were very larg-e. I have taken it at Hornsea. 



SucciNEA PUTRis is not so common, thoug-h I have found it at Hornsea and. 

 Wansford Road, Foston, and Rotsea. 



Carychium minimum we took in plenty at Flamboroug-h Head, also at 

 Sledmere and Wansford Road. 



Ancylus fluviatilis is found generally in the streams especially on Foston. 

 side of Driffield. 



ACROLOXUS LACUSTKis is conimon on the reeds of the canal at Wansford.. 

 I have also taken it in an old pond at Skerne. 



LiMN^A AURICULARIA we have taken in the Foston streams and canal; also 

 at Hornsea Mere, Rotsea Carr, Wansford Road. 



LlMN^A PEREGER. Everywhere. The rare form stagnaliformis we took in 

 Kirkburn Gypsey Race. 



Limn.5;a PALi'STRis is found in the canal and trout streams of Driffield, 

 Kelleythorpe Marshes, in Foston streams, and Hornsea, and is fairly 

 distributed. The specimens are very fine. 



Yar. CORVA we have taken, and the same vole-eaten at Driffield. 



Limn.^;a truncatula is found everywhere. A wold pond near Cottam 

 abounded in the same, perhaps carried by the sheep, or maybe having- 

 travelled, as is their wont, overland. The Hornsea ]Mere specimens 

 are remarkable for their clear reddish horn colour. 



LiMN/EA stagnalis is found in the canal, Foston streams, Hornsea Mere, 

 North Frodingham. At North Froding-ham they were very larg-e in 

 a pond in a field. Also in a drain near the canal they were plentiful. 



Of the freshwater mollusca : 



Planorbis corneus we have taken plentifully in streams at Foston, and 

 also at Rotsea Carr and Kelleythorpe Marshes. 



Planorbis albi'S is common from Hornsea to Driffield, and g-enerally. 



Planorbis crista at Foston and Hornsea. 



Planorbis carinatus and P. u.mbilicatus are common. 



1''l.\nort?is vortex is also common. 



rLAN(.">RHis SPIRORBIS is not SO conniion, but is found at Hornsea, and in 

 the Foston streams and the canal. 



Planorbis contortus is fairlv common. 



Naturalist, 



