HELIX. 213 



was of a light colour the animal was black, and that 

 the clear transparent band which often accompanies the 

 white variety appeared to be black when the animal 

 occupied the shell. The largest specimens of H. virgata 

 that I have ever seen were collected by Mr. William 

 Thompson near Weymouth ; they were four-fifths of an 

 inch in breadth. Sometimes the mouth has two ribs, 

 which are placed at a little distance from each other. 

 Lady Elizabeth Finch presented me with a very prettily- 

 marked variety from Sandgate. 



This species differs from H. Pisana in its much smaller 

 size, more prominent spire, having only one band on the 

 body whorl, and in the larger and deep umbilicus. It 

 is very variable in the shape and markings of the shell. 

 Moquin-Tandon has particularized seventeen varieties, 

 besides eleven more of H. lineata, which very closely 

 approaches the present species. Several of these varie- 

 ties have been described by Continental authors as di- 

 stinct species. The typical form is the H. variabilis of 

 Draparnaud ; but the name given by Da Costa was long 

 anterior. 



17. H. CAPERA'TA*, Montagu. 



H. caperata, Mont. Test. Brit. p. 430, pi. 11. f. 11 ; F. & H. iv. 

 p. 59, pi. cxvii. f. 7. 



BODY pale or yellowish -grey, streaked with brown ; tuber- 

 cles rather large and close-set, with fine black points : mantle 

 greyish-brown, minutely speckled with black and milk- 

 white : tentacles long and rather slender, having a dusky 

 hue ; bulbs somewhat globular : foot nearly truncate in 

 front, ending in a short and blunt tail, which is, as well as 

 the sides of the foot, of a lighter colour. 



SHELL subconical, compressed both above and below, 

 solid and opaque, not glossy, greyish-white, with usually a 



* Wrinkled. 



