47 130 Proceedings of the Royal Irish Academy. 



Pectinaria belgica (Pallas). 



1865. Pectinaria belgica. Malmgren, p. 356. 



The only specimens of this species obtained in the district were secured 

 by passing the rich black mud from the bottom of Killary Harbour through 

 a sieve. Some of the specimens grow here to a great size, up to SO mm. in 

 length. The longest tube obtained was 90 mm. long. 



This species has been repeatedly confused with Lac/is Koreni, and its 

 distribution is probably much more restricted than would appear from the 

 records. It is a northern form. 



Habitat. — Clew' Bay — Dredged on 3 occasions in Killary Harbour, in 

 8-17 fms. 



Distribution. — Irish Sea (Lambay Deep); Scotland (St. Andrews); 

 Scandinavia ; Belgium. 



Lagis Koreni Malmgren. 



1891. Lagis Koreni. De Saint-Joseph, p. 405. 



Tins species is common in Blacksod Bay, living in clean sand, more rarely 

 in the sand under stones. 



Habitat. — Blacksod Bay — Found on the shore, on 8 occasions. Dredged 

 in 6-8 fms. Ballynakill Harbour — Found once on the 

 shore. 

 Distribution. — Great Britain (Plymouth) ; France ; Scandinavia ; North 

 Sea : Mediterranean. 



Family CAPITELLIDAE. 



Capitella capitata (Fabricius). 



1887. Capitella capitata. Eisig, p. 849. 



This species is not very common in the district, and was only taken on 

 4 occasions. Mature specimens were found in August. 



Habitat. — Blacksod Bay — In muddy sand on the shore. Dredged in 



1 fm. Clew Bay — In sand near the Harbour, Clare Island. 



Dredged in Laminaria roots, 13-24 fms. 



Distribution. — British Isles ; Scandinavia; Arctic; North Sea; Madeira; 



Naples; Black Sea; east coast of North America; South Africa ; Kerguelen. 



Notomastus latericeus M. Sars. 



1894. Notomastus latericeus. De Saint-Joseph, p. 117. 

 This species is very abundant on the shore in clean sand, and especially 

 in the sand of Zostera beds. It is also common in muddy sand and gravel. 



