104 HELICID^. 



aspera. Held. Isis, 1837, 910. — Poraatia adspersa. JBeck, 

 Ind. 44. 



Inhab. gardens, old walls, &c. Common. 



Animal warty, yellowish-grey, Avith a paler dorsal 

 streak. {Rossm. Icon. t. 4. f. 75.) The jaw broad, 

 costated in front, and toothed on the edge. 



Shell an inch and a half in diameter, covered 

 with a creased or coarsely wrinkled skin, somewhat 

 globular, with the mouth a little longer than wide, 

 the edge of which is slightly reflected ; of a dull 

 olive colour, with generally four interrupted brown 

 bands, one and rarely two of them penetrating the 

 mouth. It varies much in colours and markings, 

 but is readily known by its wrinkled coat. 



1. It varies in colour. Sometimes they are pale 

 yellowish, without bands, but generally banded, 

 sometimes the bands are all separate, but generally 

 the second and third bands are united into one ; 

 sometimes all the bands are united together, which 

 makes the shell appear darker, and marked with 

 transverse pale lines. 



2. It varies greatly in size according to the quan- 

 tity of food, and the temperature of the place in 

 which it lives. 



Monstrosities sometimes occur : — 1. Reversed, or 

 with the whorls turned in a contrary direction. 2. 

 With the spire elongated, and conical when the 

 whorls are rounded. 3. With the whorls produced, 

 and separated from one another* : the latter has been 

 called — Cornucopia Born, Mus. 262. Serpula Cor- 



* A figure of this monstrosity ornaments the covers of this 

 work. 



