252 



GOB1AD/E. 



rally conic or angular, but sometimes irregularly truncated, 

 though always fimbriated." 



" This is occasionally taken, with others, among the 

 rocks on the south coast of Devon, in the pools left by the 



retiring tide.' 



Mr. Couch has obligingly sent me a specimen from Pol- 

 perro ; and in his recently published Fauna of Cornwall men- 

 tions that it is not uncommon. 



i vie;; ' 



