ROE15UCK : I'HE CONCHOLOGY OF MAI, HAM. 265 



Helix hortensis. Malham, van lutea ooooo and 10345 ; W. West. 



Helix arbustorum. An abundant and variable species. Airton ; 

 W. Nelson. Gordale Scar ; W. Nelson. Common at Malham ; 

 W. West. Common at Bell Busk ; J. W. Taylor. 



The var. alpestris occurs at Malham, with type and var. 

 pallida; W. West. 



The var. Jlavescens is not uncommon. Malham ; W. West. 

 Airton ; W. Nelson. 



The var. pallida is also not uncommon. Malham ; W. West. 

 Foot of Gordale Scar ; W.D.R. 



The var. marmorata is common at Malham ; W. West. 

 The var. canigonensis has occurred once. Bell Busk ; 

 |. Madison. 



Helix rufescens. Common at Malham ; W. West. Above 

 Malham Cove, at 1,300 ft. alt.; W. West. Kirkby Malham; 

 W. Nelson. Bell Busk ; W.D.R. 



The var. rubens has occurred at Malham, with type ; W. West. 



Helix hispida. Common at Malham ; W. West. Gordale ; 

 W. West. Near Malham Tarn, at 1,300 ft. alt. ; W. West. 



Helix ericetorum. Malham ; W. Nelson. Malham Cove ; 

 J. W. Taylor. Airton ; W. Nelson. 



Helix rotundata. An abundant species. Airton; W.D.R. 

 Common at Malham ; W. West. Kirkby Malham ; W. Nelson. 

 Common at Janet's Cave; W.D.R. Common close to Malham 

 Tarn House, at 1,300 ft. alt.; W.D.R. 



Helix rupestris. Occurs on limestone rocks and walls in great 

 profusion. Kirkby Malham ; W. Nelson. Common on lime- 

 stone rocks at Malham ; W. West. Above Malham Cove, at 

 1,300 ft. alt.; W. West. Janet's Cave, abundant on limestone 

 walls; W.D.R. Airton, abundant ; W.D.R. Common on walls 

 near Bell Busk; W.D.R. Gordale, at 1,000 ft., common; 

 W. West. Common close to Malham Tarn House ; W.D.R. 



Helix lapicida. An abundant species. Near (iordale Scar ; 

 W. Nelson. Common at Malham ; W. West. Hanlith ; W. West. 

 The var. nigrescens has once occurred at Malham ; W. West. 



Bulimus obscurus. Gordale Scar ; W. Nelson. 



Pupa umbilicata. An abundant species. Common at Malham, 

 on limestone rocks ; W. West. Close to Malham Tarn House, 

 alt. 1,300 ft.; W.D.R. Gordale Scar; W. Nelson. Kirkby 

 Malham ; W. Nelson. Airton ; W.D.R. Bell Busk ; W.D.R. 



Pupa marginata. Limestone rocks at Malham; W. West. 



Sept. i8go 



