47 54 Proceedings of the Royal Irish Academy. 



This species is comparatively rare. Mature females were found in 

 August and November. The dorsum is mottled with dark brown in a 

 regular and complex pattern, and there are two spots of brown on each 

 foot. The body has 32 setigerous segments. 



The specimen dredged in Cleggan Bay differed from the type in several 

 respects. The scales had, in addition to the usual small globular papillae, a 

 number of large egg-shaped papillae scattered over the surface (PI. V, fig. 11). 

 At the top of each of these was a smaller papilla, probably sensory in function. 

 The tips of the dorsal bristles were not bifid, as in the type, but pointed like 

 a spear. 



Habitat. — Blacksod Bay — Two specimens obtained, one on the shore, 

 the other dredged in 4§ fms. Clew Bay— Dredged on two 

 occasions, east of Clare Island, in 7-16 fms. Dredged in 

 Killary Harbour in 7 fms., on mud. Cleggan Bay — 

 Dredged in 5-10 fms. 

 Distribution. — British Isles ; North Sea ; France ; Spain ; Madeira ; 

 Mediterranean. 



Scalisetosus assimilis Mcintosh. 



1900. Scalisetosus assimilis. Mcintosh, p. 377. 



This species was frequently found in Clew Bay, coiled round the peristome 

 of Echinus esculentus, or crawling about the spines, in both of which positions 

 it is very inconspicuous. It is almost transparent, with two dark bands along 

 the dorsum, and paler pigment between them. The anterior pair of elytra 

 have an inner border of red-brown colour. The mid- dorsal line is green in 

 specimens preserved in formalin. Mature specimens were found in August. 



Habitat. — Clew Bay— Obtained on seven occasions, in 5-15 fms. 



Distribution. — British Isles ; France; Spain. 



Halosydna gelatinosa (M. Sars). 

 1900. Halosydna gelatinosa. Mcintosh, p. 384. 

 Habitat. — Blacksod Bay — Found on the shore on sixteen occasions. 



Clew Bay — Annagh Islands. Off Clare Island, in 2-4 fms., 



a young specimen with eleven pairs of elytra, in August. 



Ballynakill Harbour— Found four times on the shore. 



Dredged in 3-5 fms. Bofin Harbour— Found once on 



the shore. 

 Distribution — British Isles ; Norway ; France ; Spain ; Madeira ; west 



Morocco. 



Polynoe seolopendrina Savigny. 



1900. Polynoe seolopendrina. Mcintosh, p. 389. 



