THE MOLLUSCA. 121 



quarters of an inch long, and half an inch wide, very 

 much compressed, rounded in front, attenuated behind, 

 much more so than Tellina tennis, and nearly white. 



Tellina donacina. An elegant oval shell, radiant with the 

 colours of the setting sun ; single valves only have been 

 found. 



Tellina solidula, one of our commonest shells, varying in colour 

 through all the shades from crimson to yellow. Roundish 

 and solid, from one quarter to three quarters of an inch 

 in diameter. 



Syndosmia alba. A pretty oval, shining, rather pellucid, white 

 shell, moderately plentiful. 



Scrobicularia piperata. Not uncommon ; found in the greatest 

 numbers opposite the Promenade, especially after a heavy 

 sea, when it is washed up from the mud in which it 

 burrows. Very flat, round, white, and varies in size from 

 half an inch to an inch and a half in diameter. 



DONACID^E. 



Donax anatinus (Wedge Shell). Common about low-water 

 mark, and often very fine. Although one of our com- 

 monest shells it is not the least handsome, being a light 

 olive colour outside, and frequently a brilliant clouded 

 violet within. 



MACTRID^E. 



Mactra subtruncata. Rather common, and generally small. 



White, solid, and somewhat triangular in shape. 

 Mactra elliptica. I have found one good perfect specimen only 



of this shell. 



