GREEN PEA-URCHIN. 



177 



and west. In Ireland, Mr. W. Thompson informs me 

 it is found at Bantry Bay and Portmarnock, and Captain 

 Portlock finds it in the north. In the Irish Sea it is abun- 

 dant, and I have dredged it frequently alive in deep water 

 among bivalve shells. In Guernsey I have found it alive 

 at low water. It probably is found throughout the seas of 

 Europe. 



I believe the Fibularia ovulum and F. tarentina of 

 Lamarck, and the Fibularia angulosa of Deslonchamps, 

 will all prove to be identical with this species. 



N 



