THE DISTRIBUTION OF ARACHNAGTIS ALBIDA M . SARS IN THE CELTIC SEA By

The present paper is an account of the distribution of Arachnactis albida (Fam. Arachnanthidae) Carlgren, 1924) in the area south of Ireland and in the western approach of the English Channel during 1937-9. This larval Cerianthid) the adult o(which is at present unknown) is a North Atlantic planktonic species. It has been collected by numerous scientific expeditions) the records . of which indicate a centre of distribution between the Faroes and the