406 ON THE FAUNA AND BOTTOM-DEPOSITS NEAR THE 30-FM. LINE 



excepting that Halecium hakcinuni is more abundant, corresponding to 

 a considerable abundance of Chactopferus vario2)cdatus, upon the tubes 

 of which it is generally growing. The tubes of the latter species were 

 generally attached to shells on this ground. Halecium lialecinum and 

 Chaetopterus show the influence of the neighbouring coarser Eddystone 

 grounds. 



Two other noteworthy fixed species are Chondractinia digiiata, fixed to 

 Cardium echinatum shells, and large colonies of Alcyonium digitatum* 

 which are numerous. In both these features the ground resembles the 

 fine sand of the Outer Trawling Ground (II.), which adjoins it. 



Wandering species. Here again the species are practically the same 

 as on Grounds III. and IV., the exceptional features being the presence 

 of several specimens of Ehalia tuherosa, a species abundant on the 

 Eddystone gravels, and the presence of a number of ITyas coarctatus.-f 



Plentiful. 



List of Species. 



Hydrozoa. 



Hydiactinia echinata. One colonj' in 101. 



Tiibiclava cornucopiae. On Dentalium 



shell. 

 Perigouimiis sp. On Dentalium shell. 



Bougainvillia raniosa. On Chaetopterus 



tube. 

 Lafoea duniosa, var. robusta. 



Campanularia verticillata. One or two 

 colonies. 



Halecium halecinum. Plentiful. 

 Sertularella Gayi. Plentiful. 

 Hydrallmania falcata. One piece only in 



101. 

 Antennularia antennina. 

 ,, ramosa. 



Aglaophenia myrio])hylluni. One piece 

 only, with Scalj)cUii7)i 

 vulgare on it. 



Plumularia pinnata. 



,, Catharina. On Chaetopterus 



tube. 



ACTINOZOA. 



Adamsia palliata. With Eupagurus Pri- 

 deauadi. 



Choiidractinia digitata. On Cardium 

 echinatum shells. Two 

 or three specimens only. 



Alcyonium digitatum. In quantity; large 

 colonies. 



ECHINODERMATA. 



Astropecten irregularis. One only, in 102. 



Asterias glacialis. \ ^ , , 



, ? Several of each. 



,, rubens. ) 



Ophiura ciliaris. A few only. 

 * Cf. p. 4.57. 



Ground VI. 



ophiura albida. 

 Amphiura elegans 

 Oijhiothrix fragilis 



Several. 



A few small ones only 

 at roots of Cellaria. 



Echinus miliaris. 



Nemertina. 

 Carinella annulata. 

 Tetrastemma dorsale. 

 Lineus bilineatus. 



Polychaeta. 

 Lagisca propinqua. Two specimens only. 

 Nereis procera. Five or six specimens. 

 Typosyllis alternosetosa. Several speci- 

 mens. 

 Polydora caeca. Several specimens. 



Chaetopterus variopedatus. Fairly abun- 

 dant. 

 Nicolea venustula. One in 101 only. 

 Thelepus. Many. 

 Sabella. 



Sabellaria spinulosa. 

 Dasychoue boml)yx. 

 Serpula vermicularis. 

 Hydroides pectiuata. 

 Potamoceros triqueter 



Several. 



Four specimens. 

 Tubes only. 

 Several. 

 Tulies only. 



Crustacea. 



Eupagurus Bernhardus. A few in Bucci- 

 num xmdatum shells. 



,, Prideauxii. Not plentiful. 



\S\i\\ Adamsia 2Mlliata. 



Anapagurus laevis. In shell of 2'ornatella 

 fasciata, and in Turri- 

 tella communis shell. 



t Cf. p. 490. 



