NOTES ON KCriNOSOMA ATLANTICUM. 265 



the size of those described by him. It is a well- 

 marked species, and is easily distinguishable from 

 any other British Ectinosoma by the comparatively 

 elongated joints of the anterior antennae and by t\ih 

 long setse of the fifth feet. It has been obtained at 

 several places in the open sea to the west and 

 south-west of Ireland, and in Kinsale Harbour ; 

 while Giesbrecht and Mobius have taken it, and also 

 Rhincalanus gigas, in the neighbourhood of Kiel. 

 There is no previous record of its occurrence on 

 the East of Scotland. It was frequent in midwater- 

 net material collected eastward of Inchkeith, Firth 

 of Forth, but less frequent in the surface -net 

 gatherings. 



