HELIX. 137 



hatched after the lapse of from fifteen to twenty days, 

 and attain their full size at the end of the following 

 year. This species may at once be distinguished from 

 H. vh'gata by the strong rib-like striae with which its 

 surface is closely covered, as well as by. its more 

 depressed spire and larger umbilicus. 



Var. I. major. — Shell larger. Norwich (Bridgman) ; Surrey 

 (Choules), B. C. Tenby occasionally, and near Birmingham 

 (G. Sherriff Tye), J.C. North Berwick abundant (McMurtrie). 



Var. 2. orjiafa, Picard. — Shell smaller with broader and 

 darker bands. Sandy coasts of North and South Wales, South 

 Devon, and Cork (J. G. J.) B.C. Near Birmingham, Tenby, 

 (G. Sherriff Tye), y.C. Bristol, Carnforth, Lancashire, Aln- 

 mouth, Northumberland (McMurtrie). 



Var. 3. subscalaris. — Shell conical, whorls more convex. 

 Cork (Humphreys), Swansea (J. G. J.), B.C. Tenby (G. Sherriff 

 Tye), J.C. 



Var. 4. Gigaxii, Charpentier. — Shell rather smaller; spire 

 more depressed, umbilicus consequently larger. Sandwich and 

 Falmouth, B.C. 



18. H. ERICITO'RUM,* MiJLLER. PL. VIII. 



Body yellowish-grey or reddish-brown, tubercles colourless 

 a id thickly set ; tentacles rather long, thickish, granulated, 

 somewhat transparent, yellowish-grey, bulbs rather swollen 

 beneath, rounded at the points ; foot slightly angular in front, 

 tapering to an obtuse point behind, margined with a slender 

 grey line ; lingual ribbon with 115 rows of 61 teeth = 7015. 



Shell considerably depressed, somewhat thin, scarcely semi- 

 transparent, rather glossy, greyish or whitish, the base of the 

 upper volutions is usually encircled by a broadish chestnut-brown 

 band which is continued round the body whorl a little above the 

 periphery, and beneath it there are from two to six narrower 

 bands of the same colour ; with slight but distinct striae in the 

 line of growth, and frequently marked with irregular indenra- 



* TnliabitinfT heaths. 



