79 



In the greenhouse at Watton in the County of Devon, 

 the seat of H. Studdy, Esq., a colony of this singular 

 species was for many years known to breed in 

 great abundance, lodged in the earth under the 

 wood-work, whence they wandered abroad in the 

 summer. No foreign earth was ever known to 

 have been admitted into the house ; and they were 

 considered by the gardeners as natives. Some 

 time since, this wood-work and the earth were re- 

 moved and replaced by stone ; and all that were 

 preserved we owe to the diligence of Mrs. Griffiths 

 and Miss Hill. 



[61. BvLiMvs Clavulus. Shell subulate, white, glossy, 

 pellucid, striate longitudinally : umbilicus minute. 



Shell a quarter of an inch long, and not an eighth 

 broad, slender and tapering to a rather obtuse 

 point, glossy white with a slight yellowish tinge, 

 transparent and striate longitudinally : spire com- 

 posed of seven or eight rather swollen and well 

 defined volutions : aperture oval-oblong, the mar- 

 gin thin and reflected at the pillar so as to form a 

 distinct but small umbilicus. 



Mr. Sowerby, in his " Genera ", considers this as 

 a species of Achatlna ; but the base of the pillar 



