Clare Island Survey — Arcliiannclida and Polychaeta. 47 47 



has numerous slender teeth, whereas in the Irish specimens there are only 

 5-6 very long teeth. 



The compound setae, which were figured with fine-pointed tips, are really 

 bifid, resembling those of M. Sczelkowii. 



Habitat. — Blacksod Bay — Three specimens found under a stone on the 

 north shore of Feorinyeeo Bay. 



Distribution. — Helgoland. 



Magalia perarmata Marion and Bobretzky. 



1908. Magalia perarmata. Mcintosh, p. 136. 



This species is common in dredged material, but is rarely found on the 

 shore. It is very frequently found in Laminaria roots dredged in shallow 

 water. 



Habitat. — Blacksod Bay — Found once on the shore. Dredged twice, in 



2-5J fms. Clew Bay — Dredged on six occasions, in 5-26 fms. 



Ballynakill Harbour — Dredged on seven occasions, in 



1-8 fms. 



Distribution. — Dublin Bay ; south-west coast of England ; north coast of 



France ; Madeira ; Mediterranean. 



Oxydromus propinquus (Marion and Bobretzky). 



1875. Gyptis propinqua. Marion and Bobretzky, p. 51. 

 '"*. This pretty and active little species was found only in Ballynakill 

 Harbour. It swims rapidly and gracefully through the water, and comes to 

 a dead stop, and even swims backwards, if its progress is opposed. 



Habitat. — Ballynakill Harbour — Taken twice in the surface tow-net, 

 and twice on the bottom, in 2-8 fms. 



Distribution. — North coast of France ; western Mediterranean. 



Ophiodromus flexuosus (Delle Chiaje). 

 PL V, fig. 9. 



1908. Ophiodromus flemiosus. Mcintosh, p. 1 17. 



This species is comparatively rare in the district. 



There is one peculiarity in the structure of the setae of this species which 

 has either been overlooked by previous observers, or is peculiar to the Irish 

 specimens. On the ventral side of the dorsal bundle of capillary setae are a 

 number of lyrate setae (fig. 9), such as are found in several other species of 

 the family Hesionidae. One stem of the foot is much stronger and longer 

 than the other, and terminates in a small rounded knob. The inferior tooth 

 is slender and finely pointed. The stem below the fork is bordered along one 

 side with fine teeth for a considerable distance. 



