118 



LUSITANIAN PROVINCE. 



usual habits of its congeners, creeps on a sandy 

 sea-bed, and -which ranges from Gijon to the ex- 

 treme south ; Cymha olla, the great volute already 

 noticed ; Lithodomus caudigerus, a curious boring 

 mussel, which takes the place here of the Date-shell 

 (Lithodomus lithophagus) in the Mediterranean, and 

 which has a range equal to that of the Chiton 

 fulvus ; Psammohia rugosa, $ipho?iaria concinna, 

 Turritella sulcata, and M i/tilus afer. We may also 

 cite Trochus itmbilicatus, a species characteristic of 

 the oceanic shores of Europe from the north-west 

 of Scotland southwards. The absence of the com- 

 mon Mediterranean Chiton siculus, on the other 

 hand, a species which, if present, was not likely to 

 have escaped the researches of the indefatigable 

 explorer to whom I am indebted for so much of 

 this information, is a significant negative fact. 



There is evidently a fine field for original re- 

 search unexplored in this portion of Europe. The 

 sea-weeds of the shores of Portugal have recently 

 been collected and distributed, but a large section 

 of their zoology is almost or quite unknown. A 

 good account, or, indeed, any pretty full catalogue 

 of the fishes of the Portuguese coast is very much 

 to be desired. We hope that before long some of 

 our naturalists will direct their attention to this 

 interesting and promising region. 



To get a notion of the ichthyology of the Lusi- 

 tanian province, we are obliged to travel out of 

 European bounds, and have recourse to the excel- 



