47 HO Proceedings of the Royal Irish Academy. 



Habitat. — Clew Bay — Dredged in 5J-11 fms. 



I have also found this species in Longh Swilly, Galway Bay, and on the 

 Dublin coast, in Lithothamnion or Laminaria roots. 



Distribution. — Norway (Molde and Drontheim) ; France (? St. Vaast, 

 ?St. Malo). 



Cirratulus cirratus (0. F. Miiller). 

 1911. Cirratulus cirratus. Mcintosh, p. 15'4. 



This species lives under stones almost up to high-water mark. It prefers 

 situations where there is a slight admixture of mud. It is sometimes fouud in 

 Laminaria roots, and young specimens have been taken in the dredge. It is 

 mature at least from June to September ; and young specimens are found in 

 the spring. 



Habitai. — Blacksod Bay — Taken on the shore on 7 occasions ; young 



specimens dredged in 4| fms., in March. Clew Bay — East 



shore of Clare Island ; young specimens dredged in 10 fms., 



in May. 



Distribution. — British Isles; shores of the Arctic seas; Scandinavia; 



France; Madeira; Canaries; east coast of North America. 



Cirratulus Mcintoshi noni. nov. 



1911. Cirratulus norvegicus ? Mcintosh, p. 171. 



" A form dredged off Drobak, Christiania Fjord, in oO-lOO fathoms," was 

 recently described by Mcintosh under the name Cirratulus norvegicus ? The 

 meaning of the query -mark is not quite clear. It may indicate that the author 

 is not certain that the form has not been previously described. In any case 

 the title cannot be maintained, as Quatrefages described a species under the 

 name Avdouinia noricegica (1865, p. 461), afterwards changed to Cirratulus 

 norvegicus by Grube (1870, p. 85 ; 1872, p. 62). The latter species is quite 

 distinct from tbat described by Mcintosh. Both occur in Clew Bay. I have 

 used the name C. norvegicus for the species recorded by Eathke, Quatrefages, 

 and Grube, and given the name C. Mcintoshi to the species described by 

 Mcintosh. Four specimens were found in Clew Bay, and of these, two 

 dredged in the mud of Killary Harbour in May and August were full of eggs. 

 Of the other two specimens, one was dredged in the mud of Inishlyre 

 Harbour, and the other was taken at night in the tow-net in Bonn Harbour. 

 I have compared them with Mcintosh's specimens, and with others of the 

 same species from the west coast of Norway. 



The relationship of this species with others having only capillary setae, 

 such as Heterocirrus Marioni de St.-Joseph, H. multibranchis Grube, 

 Cirratuhis filiformis Keferstein, C. tenuisetis Grube, etc., requires investi- 

 gation, and it will doubtless be found that a number of these titles refer to 



