302 JOURNAL OF CONCHOLOGY, VOL. 12, NO. II, JULY, I909. 



var. maculata Moquin-Tandon. — Ca.stle Hill, Ayton Road. 



var. rufulozonata Taylor. — Rare near Seamen 



var. radiata Hidalgo. — Ayton Road, near Seamer. 



var. nigrescens Grateloup — Near Seamer, Forge Valley, Seamer 

 Moor. A very dark violet form occurs. 



var. lutescens Moquin-Tandon. — Common. 



var. subalbida Poiret. — Common throughout the district. 



var. albicans Grateloup. — Common, Castle Hill. 



var. hyalozona Taylor. — Rare. Castle Hill, Ayton Road, 

 Seamer. 



m. scalariforme. — Several, Castle Hill. 



m. sinistrorsum. — One near Seamer (Gyngell). 

 Helicella itala (Linne). — Abundant where it occurs. Castle 

 Hill, North Cliffs, Osgodby, northern escarpment of the Wolds, Suf- 

 field, Silpho, Yedmandale, cliffs at Filey, near Ayton. 



var. leucozona Moquin-Tandon. — Rare, Castle Hill. 



var. hyalozonata Cockerell — Rare, Castle Hill. 

 Helicella caperata (Montagu). — Generally distributed both in 

 Scarborough and to the north, west, and south. A very handsome 

 form occurs at Osgodby. Seems partial to Sednm acre. 



vaa. gigaxii Charpentier. — Not uncommon. 



var. subscalaris Jeffreys.— Osgodby. 



var. bizonalis Moquin-Tandon. — Forge Valley, rare. 



var. ornata Picard. — Forge Valley, Wheatcroft, Ganton, Lind- 

 head. 



var. fulva Moquin-Tandon. — Burniston, near Seamer, Seamer 

 Moor, Forge Valley. 



var lutescens Pascal.— With type. 



var. alba Picard. — Rare, Forge Valley. 



m. sinistrorsum. — One specimen found by Mr. Gyngell in 

 Ayton Quarry. 



Helicella cantiana (Montagu). — Has not been observed north 

 of Scarborough. Stepney Hill, Seamer Road, Musham Bank, 

 Ganton, Staxton, Hunmanby and district. Common where it occurs. 



var. albida Taylor. — Musham Bank, Stepney Hill. 

 Hygromia fusca (Montagu). — Very common in several localities. 

 Forge Valley, Hackness, Yedmandale, Raincliffe, Hayburn Wyke, 

 Scalby. 



var. vitrea Farrer. — Forge Valley. 

 Hygromia granulata (Alder). — " Perhaps the commonest shell 

 in Forge Valley" (Rev. W. C. Hey). Yedmandale, Scalby Beckside. 



