Clare Island Survey — Archiannelida and Potychaeia. 47 135 



Habitat. — Blacksod Bay — Found in the sand on the shore on 13 occasions. 



Dredged on 2 occasions, in 4-5 \ fms. Clew Bay — Dredged 



in Inishlyre Harbour, in 4 fms., on corallines. Ballyna- 



kill Harbour — Found once on the shore. 



Distribution. — Ireland (Galway Bay, Valencia Harbour) ; Great Britain 



(Bangor, Firth of Forth). 



Petaloproctus terricola Quatrefages. 



1894. Petaloproctus terricola. De Saint- Joseph, p. 144. 



Two specimens of this species were found in Blacksod Bay, living under 

 stones on the shore. They were compared with individuals from St. Vaast- 

 la-Hogue, with which they agreed closely. The identification was confirmed 

 by Arwidsson. The species has not previously been recorded from the 

 British Isles, and has only been found on the Atlantic and Mediterranean 

 shores of France. 



Habitat. — Blacksod Bay— Found on 2 occasions, on the shore. 



Distribution. — Atlantic and Mediterranean shores of France. 



Heteroclymene robusta Arwidsson. 



1906. Heteroclymene robusta. Arwidsson, p. 227. 1911. H. r. 

 Arwidsson, p. 224. 



A single complete specimen was dredged in Ballynakill Harbour, in 1-3 

 fms. It was named by Arwidsson (1911). This is the only record from the 

 British Isles. 



Habitat.-— Ballynakill Harbour — Dredged in 1-3 fms. 



Distribution. — West of Ireland ; west coast of Norway. 



Family ARENICOLIDAE. 

 Arenicola marina (L.). 

 1909. Arenicola, marina. Ashworth, p. 1. 1912. A. m. Ashworth, 

 • p. 86. 



Post-larval stages of this species were found in Laminaria roots in 

 September. One pelagic specimen, enveloped in a gelatinous tube, was 

 taken in the surface tow-net in March, in Blacksod Bay. 



Habitat. — Blacksod Bay— Very common in the sandy beaches. Clew 

 Bay— Common on the sandy beach near the Harbour, Clare 

 Island. Ballynakill Harbour — Common in the sandy 

 beaches. 

 Distribution. — Shores of North Atlantic, Arctic, and western 

 Mediterranean, 



