Clare Island Survey — Archiannelida and Polychaeta. 47 17 



and by the characteristic pair of anal appendages. This species has not been 

 found previously in British waters. 



Habitat. — Clew Bay — Dredged on 2 occasions, in 24-27 fms., south-west 

 of Clare Island. 



Distribution. — Helgoland ; Mediterranean (Villefranche, Naples, Messina). 



Order POLYCHAETA. 



Family SYLLIDAE. 



Exogone gemmifera Pagenstecher. 



1908. E.g. Mcintosh, p. 151. 



Mature specimens were found from May to October, sometimes swimming 

 on the surface. 



Habitat. — Blacksod Bay — Common in Laminaria roots. Dredged in 

 1 fathom. Clew Bay — Dredged in Inishlyre Harbour on 

 three occasions, in 2-5 fms. Dredged in the bay on five 

 occasions, in 9-28 fms. Ballynakill Harbour — Dredged 

 on 11 occasions, in 2-8 fms. Bofin Harbour — Dredged on 

 4 occasions. 



Distribution. — British Isles ; France ; Madeira ; Mediterranean. 



Exogone hebes, var. hibernica, var. nov. 

 PI. I, figs. Ia-h. 



1884. Paedophylax hebes. Webster and Benedict, p. 716. 1887. P. h. 

 Webster and Benedict, p. 721. 



The specimens from the west coast of Ireland show several small 

 differences from the description and figures of Webster and Benedict. 

 However, the points of agreement are so numerous that it seems preferable, 

 for reasons given below, not to create a new species, but to give a full 

 description and figures, with which the American specimens may be 

 compared. 



The largest specimen is 7 mm. long, and consists of 31 setigerous 

 segments. The body is widest near the middle, and tapers gradually towards 

 each end. It is creamy white in colour, without any pigment. 



The head (figs. 1a, 1b) is separated from the palps and buccal segment 

 by faintly marked grooves, and the length exceeds the width. It bears three 

 tentacles, a long median subulate one, and two small laterals. The latter 

 are about -j-th as long as the median tentacle. There are three pairs of eyes 

 situated outside the lateral tentacles. In the type specimen, from Galway 

 Bay, the eyes are very small, especially the anterior pair, and are arranged 



R.I. A. PKOO., VOL. XXXI. C 47 



