4C0 



REPORT — 189 J. 



volumes of the ' Challenger ' Expedition Report which seemed not to be 

 in accord with our experience. Dr. Murray quotes the statistics of the 

 Scottish Sea Fisheries Board to show that only 7-3 species of invertebrates 

 and 8-3 species of fishes are captured on the average by the 'Garland's' 

 beam trawl ; ^ and he cites as an example of a large and varied haul from 

 deep water one taken by the 'Challenger' at Station 146 in the Southern 

 Ocean, at a depth of 1,375 fathoms, with a 10-foot trawl dragged for at 

 most 2 miles during at most two hours, when 200 specimens were cap- 

 tured belonging to fifty-nine genera and seventy-eight species. Murray 

 then goes on to say : 'In depths less than 50 fathoms, on the other hand, 

 I cannot find in all my experiments any record of such a variety of 

 organisms in any single haul, even when using much larger trawls and 

 dragging over much greater distances.' He must ha^-e been singularly 

 unfortunate in his experiments, as our experience of dredging in the Irish 

 Sea is that quite ordinary hauls of the dredge or very small trawl (only 

 4-foot beam) contain often more specimens, species, and genera than 

 the special case cited from the ' Challenger ' results. On the first of our 

 expeditions after the appearance of Dr. Murray's volumes we counted the 

 contents of the first haul of the trawl. The particulars are as follows : — 

 June 23, 7 miles W. of Peel, on North Bank, bottom sand and shells, 

 depth 21 fathoms, trawl 4 feet beam, down for 20 minutes; 232 specimens 

 were counted, but there may well have been another 100 ; they belonged 

 to at least 112 species and 103 genera, a larger number in every 

 respect— specimens, species, and genera — than tlie 'Challenger' haul 

 quoted. The list of these species is here given, and the marine zoologist 

 will see at a glance that it is nothing out of the way, but a fairly ordi 

 nary assemblage of not uncommon animals such as is frequently met when 



dredging in from 15 to 30 fathoms. 



Sponges : 



Renicra, sp. 

 Halichondria, sp. 

 Cliona celala 

 Siiherites domnricula 

 Chalina octdata 



CCELENTEEATA : 



Bicoryne confcrta 

 Halecium Jialecinnm 

 Surtularia aMetivM 

 Coppinia arcta 

 Hydrallnianiafalcata 

 Campaimlaria verticillata 

 Lafo'ia dinnosa 

 Antennularia ramosa 

 Alcyonium digitatum 

 Virgularia mirahilis 

 Sarcodictyon catenata 

 Saqartia, sp. 

 Adamsia palliata 



ECHINODEEMATA : 



Cuoumaria, sp. 

 Thy one fusus 

 Asterias rubens 

 Sulaster papposus 

 Stichaster roseus 



Poranla pulrilliis 

 J'aliidpes jjlaceiita 

 Ophiocnma nigra 

 OpMotJirix ])entaphylliim 

 Amplimra Chiafii 

 Opliioglyplia ciliata 

 0. alhida 

 £chinus sphccra 

 Spatangus purpurevs 

 £c7ii.nocardiuni cordatum 

 Brissopsls lyrifera 

 EcM nocyam us p usi llus 



Vermes : 



Nemertes Neesii 

 Chatoptertis, sp. 

 Spirorhls, sp. 

 Serpula, sp. 

 Salella, sp. 

 Owenia filiformis 

 ApTirodite aculeata 

 Polynoe, sp. 



Ceustacea : 



Scalpellum vulgare 

 Balmius, sp. 

 Cycloplcera nigripes 

 Acontiophorus elongatus 



' It has been shown in the Presidential Address to Section D at Ipswich that Dr. 

 Murray must have misunderstood the observations in question. 



