I40 Shell Life 



coloured or red skin, twice the length of the shell. It 

 is common on sandy shores on all our coasts, ranging 

 from 5 to 100 fathoms. At Jersey very fine specimens 

 may be taken from muddy sand at low water. The 

 Rough Cockle {G. tiiberculatiiin) resembles the last 

 species in general appearance, 

 but differs from it in havincf a 

 larger, more solid, and globular 

 shell. The ribs are coarser, and 

 the spines upon them are inter- 

 rupted by intervening spaces, 

 whilst in C. echinatu'ni the rows 

 , ^ , , are continuous ; some of the 



Rough Cockle ^ _ ' 



spines (in fuherculatum) are 

 short and blunt, others flattened. This also is a 

 southern form, found in sand at extreme low water 

 to about 12 fathoms on the coasts of Dorset, Devon, 

 Cornwall, Guernsey, and Bantry. Diameter 3 inches. 

 The Warty Cockle (0. papillosnvi) is a small species 

 whose longest diameter is little more than half an 

 inch, the shell globular, solid, glossy, with about 25 

 flat ribs close together. It is coloured yellow and 

 streaked with reddish brown. It occurs in the 

 Channels Islands in coarse sand, between 15 and 20 

 fathoms. At Herm it has been taken at low water. 

 Fresh valves have also been dredged at Falmouth 

 (19 fathoms), and Scilly (40 fathoms). The 

 Little Cockle (6^. exiguum) has a small, solid, 

 dull shell, with about 20 compressed ribs, 

 which are covered in young examples with 

 Avhite warts ; white or yellowish, sometimes 

 streaked with brown. It is pretty generally distrib- 

 uted along our shores, occurring in soft ground a 



