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The Plankton of the Faroe Channel and Shetlands. 



Preliminary Notes on some Radiolaria and 

 Copepoda. 



By 

 R. Norris Wolfenden, M.D., Cantab., F.Z.S. 



(With Plates I.-IV. and a Chart.) 



In the year 1899 I commenced a series of tow-nettings round the coast 

 of Shetland, and established four stations — one south of Sumburgh 

 Head (IIL), one west of Papa Stour (IV.), one of the northernmost 

 points of Shetland (V.), and one due east of Bressay (VI.). During 

 1899 my yacht (the Walwin), a cutter of forty tons, made the round 

 of these stations once a month during October, No.vember, and 

 December; and in 1900 during January, February, March, April, May, 

 and June. During July, 1900, a passage was made across to Thorshaven 

 (and back to Scalloway, Shetland), where stations were established, 

 numbered respectively Al, A2, A3, A4, A5, AG, A7, A8, A9. (See Chart.) 

 During August, 1900, only a short trip to the first two stations in the 

 Faroe Channel was possible. In October, 1900, January, 1901, A})ril, 

 1901, the stations round Shetland were visited again, and during 

 May, 1901, a further passage was made to Thorshaven and back to 

 Scalloway, visiting the stations previously fixed in the Faroe Channel. 

 This passage was repeated in June, 1901, and again in July, 1901. 



At each station round Shetland a surface haul was made with a fine 

 silk net, followed by a vertical haul with an open net ; and in February, 

 1901, I used for the first time a closing net supplied to me by the 

 Plymouth Biological Station, and designed by my friend Mr. W. 

 Garstang. This has subsequently been used on every occasion, both 

 at the Shetland stations and on each trip to the Faroe Islands. 



Thermometers were attached to the net, a reversing thermometer 

 of Negretti and Zambra's pattern, supplied with Knudsen's bulb, and 

 a IMiller-Casella minimum thermometer; and the temperatures of each 

 haul have been carefully recorded. In addition to these hauls a mid- 

 water net of Professor Mcintosh's pattern, supplied to me from 

 St. Andrews, was used on every occasion whei'e it was practicable. 

 The procedure adopted has been as follows : At the Shetland stations 



