5IO 



DEPTHS OF THE OCEAN 



Ophiopholis aculeata, OphiotJirix fragilis, Nephrops norvegicus, Pagurus 

 bernJiardus and P. Icevis, Rossia macrosoina, Pecten septemradiatus and 

 P. opercular! s, Oceanapia robusta, Ficulina ficus (with Pagurus pubescens) 

 as well as many other sponges. Occasionally we got Sipho islandicus, 

 Natica sp., Neptunea antiqua (with Chondr actinia digit atd), Bolocera 

 tuedics, Halipteris christi, Atelecyclus septemdentatus, Inachus dojynchus, 

 Portunus tuberculatus, Galathea nexa, Pagurus vieticulosus, Onuphis 

 tubicola. Nereis sp., Stichopus treniulus, Brissopsis lyrifera, Luidia ciliaris, 



Ophiura ciliaris, Ascidia 

 venosa, etc. 



This list shows that 

 several forms found in 

 the Norwegian depres- 

 sion and on the deep 

 muddy bottom occur 

 here also. Two crus- 

 taceans [Hyas coarctatus 

 and Munida rzigosa, see 

 Fig. 355) should be 

 noticed in particular, as 

 they inhabit the plateau 

 in large numbers, and 

 seem to furnish an 

 important supply of 

 food to the larger kinds 

 of fish ; they were both 

 also taken by the trawl 

 in 200 metres on the 

 Norwegian coast - bank 

 off Stat. In addition we 

 secured a couple of star- 

 fishes [Pout aster tenui- 

 spinus and Astropecten 

 irregu I arts), while 

 brachiopods, bryozoans, 

 chitons, etc., were attached to the stones. Among the 

 amphipods we noticed species of the genus Hoplonyx, immense 

 numbers of which sometimes collect on dead fish or baited 

 lines. 



British investigators have made the plateau round the 

 Shetland islands, to a depth of about 200 metres, one of the 

 most familiar.^ Most of the Shetland forms are identical with 

 those occurring in the Norwegian boreal region, but we do 



^ For details see Report of the British Assoc, 1868, pp. 232-342. 



Fig. 355. 

 MiDiida rugosa, Fabr. 



