268 Mr. W. S. M. D'Urban on the 



towards the extremity, and of a rather dark horn-colour. 

 Branches are given off irregularly, which are ringed at the 

 base and at intervals above it; they bear alternate polypi- 

 ferous ramules, similarly annulated. The form is nearly 

 allied to E. ramosum, if not identical with it. 

 Lat. 72° 32' 3" N., long. 36° 29' 5" E., 128 fms. 



Suborder Thecaphora. 

 Genus Caltcella, Hincks. 

 Calycella fastigiata, Alder. 



Lat. 75° 16' 6" N., long. 45° 19' 36" E., 160 fms., on Al- 

 cyonidium; lat. 72° 32' 3" E., long. 36° 29' 5" E., 128 fms., 

 on Gemellaria, &c. ; lat. 71° 23' N., long. 49° 38' E., 67 fms. 



In the Barents-Sea specimens the pedicels are long and 

 distinctly annulated ; in the British examples which I have 

 seen they are smooth. 



Genus Lafoea, Lamouroux. 



Lafoea grandis, Hincks. • 



Lat. 75° 16' 6" N., long. 45° 19' 36" E., on Myriozoum, 

 160 fms. [Davis Straits, 100 fms. ( Wallich); Atlantic coasts of 

 America (Verrill).] 



Genus Lafoeina, M. Sars. 



Lafoeina tenuis, Sars. 



Lat. 71° 23' N., long. 49° 38' E., on Cellularia Peachii, in 

 67 fms., and lat. 71° 6' N., long. 50° E., in 62 fms., off Novaya 

 Zemlya. 



Genus Filellum, Hincks. 



Filellum serpens, Hassall. 



Lat. 74° N., long. 23° E., in 220 fms., on Sertularella 

 tricuspidata. Also very fine on Balanus, off Bear Island, in 

 25 fms. 



Genus Halecium, Oken. 



Halecium muricatum, Ellis and Solander. 



Fragments with fine capsules amongst a mass of Gemellaria 

 loricata, off Bear Island, in 25 fms. 



Genus Sertularella, Gray. 



Sertularella tricuspidata, Alder. 



Extremelv abundant. Lat. 74° N., long. 23° E., in 



