}IAR(;RKAVES ; MOI.I.USCyV IN THK SCARBOROUGH DISTRICT. 30I 



Vitrea radiatula (Alder).— Not common, but well distributed 

 north and south of Scarborough. Stepney Hill, Forge Valley, 

 Oliver's Mount, Hayburn A\'yke, Yedmandale, Bedale. 



van viridescenti-alba Jeffreys. — Hayburn Wyke, Nov., 1901. 

 Zonitoides nitidus (Miiller).— Bog on Castle Hill, 1896 to 

 1900 : now probably extinct. 



Zonitoides excavatus (Bean).— Hayburn Wyke, rare. Forge 

 ^^alley near Stoggs Farm. 



Euconulus fulvus (Miiller). — Common in suitable localities all 

 round Scarborough ; fine in Forge Valley. Yedmandale, Hayburn 

 Wyke. 



var. alderi Gray. — Raincliffe, Forge Valley. 

 Arion ater (Linne).— Common throughout the district. 



var. brunnea Roebuck. — Raincliffe, common at times in Forge 

 Valley. 



var. rufa Linne. — Langdale End. 

 Arion subfuscus (Draparnaud). — Harwood Dale, Y.N.U., 1904. 

 Arion intermedius Normand. — Hayburn Wyke, Harwood Dale, 

 Seamer Moor. 



Arion hortensis Ferussac. — Very abundant throughout the 

 district. 



Arion fasciatus Nilsson — Castle Hill, south of Scarborough, 

 common in Forge Valley. 



Punctum pygmaeum (Draparnaud). — Well distributed. Rain- 

 cliffe, Forge Valley, East x'\yton Quarry, abundant Nov., 1904; 

 Hackness. 



Sphyradium edentulum (Draparnaud). — Common. Occurs on 

 Lastrcra, Iris, Carex pendula, Spircpa, etc. ; Hackness, Forge ^''alley, 

 Raincliffe, cliffs south of Scarborough. 



var. columella G. von Martens. — Forge Valley. 

 Pyramidula rotundata (Miiller). — Very abundant throughout 

 the district. 



var. turtoni Fleming. — Scalby Beckside, Ayton. 

 var. alba Moquin-Tandon. — Hackness, 1896 : Yedmandale, 

 Forge Valley, Wrench Green. 



Helicella virgata (DaCosta). — Perhaps our most abundant 

 species. ^^aries enormously in colour, size, and markings. 



Thoroughly distributed. 



var. depressa Requien. — Near Ayton. 



var. lineata Olivi. — Common. 



var. leucozona Taylor. — Common near Seamer. 



