47 134 Proceedings of. the Royal Irish Academy. 



Habitat. — Blacksod Bay — Found on the shore on 11 occasions. Dredged 

 on 6 occasions, in 1-8 fins. Clew Bay — Shore of Achill 

 Island. Dredged in Inishlyre Harbour on 2 occasions, in 

 2-5 fms. Dredged in 14 fms., 1-|- miles off Cleggan Head. 

 Ballyxakill Harbour — Dredged on 11 occasions, in 1-8 

 fms. Bofln Harbour — Dredged on 17 occasions, in 1-6 

 fms. 



Distribution. — West coast of Ireland : south-west coast of England ; 

 France ; Mediterranean : Bed Sea. 



Family MALDANIDAE. 



Micromaldane ornithochaeta Mesnil. 



1897. Micromalda7ie omithocJiaeta. Mesnil, p. 146. 



A number of specimens of this interesting little species were found in 

 Laminaria roots dredged in 9-11 fms., in Clew Bay. I have also found them 

 in Laminaria roots from Howth, Co. Dublin. Apparently the species has been 

 previously seen only by Mesnil, who found it in the cavities of Lithoth amnion 

 polymorphum at La Hague, near Cherbourg. 



Habitat. — Clew Bay— Dredged in 9-11 fms. 



Distribution. — France (La Hague). 



Nicomache maculata Arwidsson. 



1911. Nicomache [Nicomache) maculata. Arwidsson, p. 209. 



This species was described by Arwidsson partly from specimens collected 

 in Blacksod Bay. They were found in muddy sand between stones on the 

 north side of Feorinyeeo Bay. 



Mature specimens were found in October. 



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



Distribution. — Ireland (Howth, Portstewart) ; Scotland (Firth of Forth, 

 St. Andrews) ; Helgoland. 



Caesicirrus neglectus Arwidsson. 



1911. Cacs kin- us neglectus. Arwidsson, p. 217. 



This species — only recently described by Arwidsson, from Irish material — 

 is exceedingly abundant in certain patches of clean sand in Blacksod Bay. 

 The fine sandy tubes project in vast numbers from the sand near low-water 

 mark. In other adjacent patches of sand, apparently of the same nature and 

 under the same conditions, Caesicirrus is quite absent. 



Mature specimens were found in September. 



