CORBULA. 355 



This species is found on the shores of Japan; while the 

 C. niicleuSj or Kernel Corhula, an ancient and well-known 

 species^ is the only one among his brethren that pertains 

 to the coasts of Britain. 



AYe may briefly mention another species, the Ovate Cor- 

 hula [C. ovata), taken from the root of a fucus at Ballaagh ; 

 and, notwithstanding the indefatigable zeal with which Pro- 

 fessor E. Forbes dredged the entire coast of the Isle of Man, 

 the specimen figured by Mr. Eeeve is the only one of the 

 genus he ever met with, and is rendered extremely interest- 

 ing by the fact, that the species has never before been dis- 

 covered either on the coast of Britain or elsewhere. 



The Triangular Corhula {C. trigona) must not be passed 

 unnoticed. It may be termed a beacon-shell, indicating, by 

 the same peculiarity of structure as the C.faha 2,tA fasciata ^ 

 that the species live in situations where the water is rather 

 brackish than salt. 



Pandora is easily recognized by a certain peculiarity of 

 form in the oblong, flexuous curve of the anterior side of 

 the shell ; as, also, by a small dividing tooth, which appears 

 in one valve only. 



The new and interesting genus Anatinella resembles, in 

 its general appearance, the Ariatina, but without any shelly 

 . 2 A 2 



