454 ON THE FAUNA AND BOTTOM-DEPOSITS NEAli THE 30-FM. LINE 



Distribution. Geograjyhical. Kara Sea, White Sea, North Cape, Norway, Baltic, 

 North Sea, British Coasts, Bay of Biscay, Mediterranean. Iceland, Greenland, Labrador, 

 Newfoundland (fide Hincks, No. 46, and Hartlaub, No. 38). South Africa (Allnian, No. 2, 

 p. 158). 



Depth. 5-75 fathoms (Allman, No. 4, Porcuphie). 



Ilahitnt. On shells, stones, etc., from deep water (Hincks). Attached to living molluscs 

 (M'lntosh, St. Andrews). Schulze (No. 105) records it from the Pommcrania dredgings 

 nine times on hard or coarse ground, twice on mud or sand in 30 and 50 fathoms. 



Sertularia argentea (Table VI.). This species was not uufrequently 

 met with on both coarse and fine grounds, though never in quantity. 

 It was growing on Pectcn opercularis shells, on stones, and on other 

 hydroids {Diphasia tamarisca). 



Distribution. Geographical. North Cape, Kattegat (Levinsen, No. 66), British and 

 French Coasts, Adriatic, Greenland, Labrador, east coast of United States, South Africa 

 (fide Hincks, No. 46). 



Depth. 8-50 fathoms. 



Habitat. On shells, stones, etc., chiefly from deep water. 



HydTcillmania falcata (Chart III.) was abundant on the Prawle Stony 

 Ground (XVIII.) and moderately plentiful on the Bolt Head Shell Gravel 

 (XVII.). On most of the fine sand grounds and coarse grounds in the 

 neighbourhood of the Eddystone occasional specimens were taken, but 

 on none of these was it at all abundant. 



The hydroid was generally attached to stones, occasionally to shells. 

 I have never seen this species attached to polychaete tubes. 



Distribution. Geographical. White Sea, Norway, Baltic, North Sea, British Coasts, 

 Gulf of St. La\\Tence, east coast of United States, South Africa {fide Hincks, No. 46, 

 and Hartlaub, No. 38). 



Depth. 12-542 fathoms [Porciqnne, Allman, No. 4). 



Habitat. On shells and stones in the coralline zone (Hincks). On dead shells 

 (Cyprina islandica, Ostrea cdulis) in Kattegat (Levinsen, No. 66). Schulze (No. 105) 

 records Hydrallmania in the Pommcrayiia dredgings four times on coarse bottom (with 

 small stones), eight times on sand and shell, and once on mud. 



Thuiaria arficulata (Chart IV.). Several colonies in hauls 27 and 

 28 on the Bolt Head Shell Gravel (XVII.), and several in hauls 45 and 

 63 on the Prawle Stony Ground (XVIII.) The species was never met 

 with on the Eddystone Grounds. Attached to stones or shells. 



Distribution. Geographical. British Seas (Hincks, No. 46), Mediterranean (Cams, 

 No. 14). 



Depth. To 632 fathoms {Porcupine, Allman, No. 4). 



Habitat. On stones and shells from deep water (Hincks). Schulze (No. 105) records it 

 once only in the Ponunerania dredgings on a bottom of sand, shell, and small stones. 



Antennidaria antennina (Chart IV.). This is typically a sand 

 species, possessing at the base of the stalk a felt-work of root-fibres, 

 by means of which it fixes itself in the sand. It is, however, not 

 uufrequently also found attached to shells. It is most abundant on the 

 fine sand grounds, I., II., V., and VI., and on Ground XII., where 

 the bottom is medium gravel mixed with muddy sand. It is rare on 

 the very fine sand of the outer trawling ground (II.), not very plentiful 



