PLEUROBRANCHUS. 561 



sinuous margin. The angles of the oral veil are acutely 

 prolonged. It lives between tide marks. 



Although seldom taken, it appears to have a wide range. 

 Exmouth (Clark) ; Guernsey ; Salcombe bay (Barlee) ; 

 Milford Haven (Lyons) ; Isle of Man ; Sound of Skye 

 (E. F.) ; Scarborough (Bean) ; Coast of Northumberland 

 (Johnston) ; Malbay, on the west coast of Ireland 

 (Harvey). 



4c 



