486 ON THE FAUNA AND BOTTOM-DEPOSITS NEAR THE 30-FM. IJNE 



Hornell (No. 49) found the species common on the shore, more sparingly in deeper water to 

 18 fathoms, in the Irish Sea. Tlie Pommerania records also agree Avith the view that this 

 species is most coninion in shallow water. Michaelsen records it, however, as plontiful in 

 the North Sea to depths of 70 fathoms. On the whole it seems prohable that H. norvegica 

 has its centre of distribution in deep water, whilst that of P. triquder is near shore. 



Spirorhis sp. A species of Spirorbis is common on the hydroid 

 Sertularia abietina, which is taken on Grounds II., XVIL, and XVIII. 



Nemertina. 



The specimens have for the most part been named either by Mr. 

 T. H. Eiches or by Mr. W. I. Beaumont. For geographical distribution 

 Burger's Naples Monograph has been relied on. 



Crustacea. 



Nomenclature : — A good list of synonyms is given by Bonnier (No. 10), 

 whose nomenclature has in most cases been used. In the identifica- 

 tionof this group I have received much help from Mr. T. V. Hodgson. 



For geographical distribution Norman (No. 93) and Gourret (No. 31) 

 have been chiefly made use of. The records of the smaller Crustacea, 

 Amp)hipoda, Isopoda, etc., are very imperfect. For the Amphipoda 

 Sars's Crustacea of Norway has been relied on for geographical dis- 

 tribution, and for the Cirripedia Darwin's monograph. 



Homarns vidgaris. Two specimens of the common lobster were 

 trawled on the fine sand of the inner trawling ground (I.) in haul 81. 

 Although the lobster generally frequents rocky places, it is not unusual 

 for one or two specimens to be captured when trawling on sand. 



Distribution. Geograpliical. "West Norway to 62° N., Sweden, Kattegat, British and 

 French Coasts, Portugal, Mediterranean (not common). (Norman, No. 93 ; Bonnier, 

 No. 10; Goun-et, No. 31.) 



Depth. Shore to 50 fathoms (?). (Lo Bianco, No. 68.) 



Bottom-deposit. Rocky places. Gourret states that the lobster was formerly abundant 

 at Marseilles, but that in 1888 it was only occasionally taken on the zostera beds. 



Pandalus brevirostris, Eathk. Chart XII. Numerous on Grounds 

 III. and IV., present on VIL and IX. This species is generally 

 abundant only where hydroids or especially Cellaria abound, amongst 

 which it is found hiding. 



Distribution. OeograjMcal. West Finmark, Norway, Sweden, Denmark, British 

 Seas, Bay of Biscay (Norman, No. 93 ; Bonnier, No. 10). Cams (No. 14) gives it as a 

 Mediterranean species, but I have found no other reference to its having been taken there. 



Dfpth. .5 to 89 fathoms (A. 0. Walker). 



Bottom-deposit. Metzger (No. 78) records Pandalus brevirostris on sand and shell, on 

 stones, and on stones and algiE in the North Sea (5-28 fathoms). Pruvot (No. 98) at 

 Roscoff on sand from the coastal region. Meinert (No. 75) on mud and sand and on nmd 

 and small stones in the Kattegat. The distribution of the species therefore appears 

 to liave little direct connection with the nature of the l)ottom-dej)osit. It will j)robably 

 depend largely on the distribution of hydroids and .such polyzoji as Cellaria. 



