Clare Island Survey — Archiannelida and Poly chacta. 47 103 



Mature specimens were found in September. 



Habitat. — Blacksod Bay— Two specimens in sand on the slime. Clew 



Bay — Dredged on two occasions, in 13-17 fms. 

 Distribution. — Great Britain (St. Andrew's, Torquay); North Sea; France; 

 Naples. 



Polydora ciliata (Johnston). 



1896. Polydora ciliata. Mesnil, p. 210. 



This species was found in Blacksod Bay in varied surroundings. It lives 

 in Lithothamnion, in the roots of corallines, in sponges, and forming tunnels 

 in old shells. 



Larval forms were taken in the surface tow -net in September ; and post- 

 larval forms were dredged in weeds during the same month. 



This species is very abundant in the rock-pools on Clare Island. Most 

 of these pools are lined with a layer of Lithothamnion in varying degrees of 

 thickness. The Polydora forms tunnels in the Lithothamnion. The two 

 black tentacles protrude from a minute opening, and wave freely in the 

 water. 



Habitat. — Blacksod Bay — Found on the shore on six occasions. Dredged 

 on 4 occasions in 2-5 fms. Cljew Bay' — Common in rock- 

 pools on Clare Island. 



Distribution. — British Isles ; France ; Arctic ; Scandinavia ; North Sea ; 

 Mediterranean ; eastern North America ; Australia (Port Jackson). 



Polydora hoplura Claparede. 



1869. Polydora hoplura. Claparede, p. 58. 



These worms were found on several occasions living in sponges such as 

 Haliclwndria pawicea, where they form slender mud-tubes. 



Habitat. — Blacksod Bay — Found once on the shore. Ballynakill 

 Harbour — Dredged in 1-3 fms. Also found on the bottom 

 of the ship. Bofin Harbour — Found in sponges on the 

 shore. 



Distribution. — Great Britain ; France ; Mediterranean. 



Polydora caeca (Oersted). 



1896. Polydora caeca. Mesnil, p. 191. 



This is probably the commonest species of Polydora on the coast. It is 

 frequently found in Laminaria roots, under Ascidians, and in sponges. A 

 specimen was dredged in Clew Bay which had regenerated the anterior end 

 after having lost the first three setkrerous segments. 



