47 83 Proceedings of the Royal Irish Academy. 



Nereis longissima Johnston. 



1910. Nereis longissima. Mcintosh, p. 325. 



The Heteronereis stage of this species was taken in the surface tow-net 

 at night in the month of May, in Inishlyre Harbour. The species is not 

 common. 



Habitat.— Blacksod Bay — A single specimen found in sand on the shore. 

 Clew Bay— Three specimens, two of them Heteronereids, 

 taken in Inishlyre Harbour. 

 Distribution. — British Isles ; Greenland; North Sea; Mediterranean. 



Nereis ^Nereilepas) fucata Savigny. 



1910. Nereis fucata. Mcintosh, p. 336. 



This species shares empty shells, usually those of Buccinium vndatv/m, 

 with the Hermit-crab Eupagurus Bernhardv.s, occupying the upper whorls of 

 the shell. 



Habitat.— Blacksod Bay — Dredged on 8 occasions, in 3-9 fms. Clew 

 Bay — Dredged in 18 fms., east of Clare Island. 



Distribution. — British Isles; North Sea ; English Channel ; Mediterranean ; 

 east North America. 



Family NEPHTHYDIDAE. 



Nephthys caeca (0. F. M tiller). 



1908. Nephthys caeca. Mcintosh, p. 8. 



This species is common on the shore under stones, in sand, and in Zostera 

 beds. The variety ciliata (Mcintosh, 1908, p. 13) was occasionally found in 

 sand in Blacksod Bay. 



Habitat. — Blacksod Bay — Found on the shore on 12 occasions. Dredged 

 in 2 fms. Ballyxakill Harbour — Found frequently on 

 the shore. Bonx Harbour— On the shore. 

 Distribution. — British Isles; coasts of Europe; Arctic seas; Puget Sound: 

 Japan ; east coast of Canada. 



Nephthys Hombergii Larnai-ck. 



1908. Nephthys Hombergii. Mcintosh, p. 17. 



This species is common on the shore under stones, in sand, mud, and 

 Zostera beds. It is frequently dredged on clean or muddy sand, or in mud. 

 The variety vaseulosa was dredged several times in Clew Bay. 



