Clare Island Survey — Archiannelida and Pobjchaeta. 47 1 07 



The anterior end and setae agree closely with the descriptions and figures 

 given by Malmgren and Wollebaek. 



Habitat. — Dredged on three occasions in Clew Bay, in 16-22 fins., on a 



bottom of sand. 

 Distribution. — Arctic ; Scandinavia ; North Sea ; Madeira ; Canada. 



Family CIRRATTILIDAE. 



Cirratulus tentaculatus (Montagu). 



1911. Cirratulus tentaculatus. Mcintosh, p. 151. 



This species is sometimes found in enormous numbers in the sand of 

 Zostera beds, where it is one of the dominant species. It also lives in the 

 sand under or between stones, and occasionally in clean sand near rocks. 

 Mature specimens were found in June. 



Habitat. — Blacksod Bay — Taken on the shore on 15 occasions. Clew 

 Bay — Shore of Clare Island near the Quay, under stones. 

 Bofin Harbour — On the shore. 

 Distribution — British Isles; France; Skagerrak ; North Sea. 



Cirratulus norvegicus (Quatrefages). 

 Plate XI, figs. 26 a-d. 



1843. Cirratulus borealis Lamarck. Bathke, p. 180, Tab. viii, figs. 16-18. 

 1865. Audouinia norwegica. Quatrefages, p. 461. 1870. C. norvegicusl 



Grube, p. 85. 1872. C. norvegicus. Grube, p. 62. 



Non Cirratulus norvegicus Mcintosh (1911, p. 171). 



A number of specimens of Cirratulus, from various parts of the Irish 

 coast, differ from any other British form, and appear to belong to the species 

 first described and figured by Bathke as Cirratulus borealis Lamarck. The 

 latter species is now regarded as identical with C. cirratus (Muller), and 

 differs markedly from that described by Bathke. Accordingly, Quatrefages 

 (1865, p. 461) separated it as "Audouinia norwcgicus," repeating the 

 diagnosis of Eathke. At the same time he stated that he had found this 

 species, or one extremely close to it, on the French coast at St. Vaast, the 

 only difference being the somewhat smaller number of dorsal branchiae. A 

 number of these specimens, labelled " Cirratulus norwcgicus" by Quatrefages, 

 are in the Paris Museum. I have been able to examine them, and without 

 exception they belong to Cirratulus tentaculatus (Montagu), a species quite 

 distinct from that described by Eathke. This fact does not, however, 

 invalidate the name given by Quatrefages to Eathke's species ; and 

 accordingly I adopt Cirratulus norvegicus (Quatrefages) as the correct name 



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