47 13S Proceedings of the Royal Irish Academy. 



Habitat. — Clew Bay — Dredged on two occasions, in 4-12 fms. Bally- 



xakill Harbour — Dredged on 2 occasions, in 1-6 fms. 

 Distribution. — Scotland : Norway ; Sweden ; North Sea. 



Flabelligera. affinis Sars. 



1894. Flabdligera affinis. De Saint-Joseph, p. 96. 



This species is very common in Blacksod Bay, where it lives under 

 stones on the shore, and in Laminaria roots. It is possible that a number 

 of the records may refer to FlaheUigcra Buskii Mcintosh (1869, p. 420, and 

 1908 A, p. 533), hut this species has not yet been adequately described, and 

 the characters given by Mcintosh are not sufficient to diagnose specimens, 

 especially when they have been preserved in spirit. 



Habitat. — Blacksod Bay — Found on the shore on 23 occasions. Dredged 

 on 2 occasions, in 1-6 fms. Clew Bay — Shore of Clare 

 Island, near Portlea. Dredged on 5 occasions, in 10-21 fms. 

 Ballynakill Harbour — Common on the shore. Dredged 

 on 2 occasions, in 1-4 fms. Bofin* Harbour — Dredged in 

 1-4 fms. 

 Distribution. — British Isles ; Aix-tic ; Siberia ; shores of western Europe ; 

 Mediterranean ; eastern North America. 



Family SABELLIDAE. 

 Sabella pavonina Savigiiy. 



1894. Sabella pavonina. De Saint-Joseph, p. 267. 



Littoral specimens were found in muddy gravel, and in the sand of Zostera 

 beds. Dredged specimens are usually attached to stones or shells. 



Habitat. — Blacksod Bay — Found on the shore on 5 occasions. Dredged 

 on 2 occasions, in 3-9 fms. Clew Bay— Shore of Annagh 

 Island. Dredged on 7 occasions, in 1-21 fms. Ballyna- 

 kill Harbour — Found on the shore, and also on the ship's 

 bottom. 



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

 Mediterranean ; eastern North America. 



Potamilla reniformis (0. F. Muller). 



1894. Potamilla reniformis. De Saint-Joseph, p. 292. 

 This species was found in Laminaria roots, in crevices of limestone, and 

 in the sponge Cliona eeldta. 

 -.Habitat. — Blacksod Bat — Dredged in 5 fms. Clew Bay — Dredged on 

 5 occasions, in 5-28 fms. 



