COUNCIL — APRIL 1912 — APPENDIX E — 90 — 



Point b: 



Plankton Résumé Vol. Ill will be published in the course of the year 

 1912 — 1913. The Bureau had received reports on: Acantharia and Heliozoa. 

 In the course of the next months reports were expected on: Peridiniales 

 ceterœ, Diatomeœ, Badiolaria cetera, Medusce, Ctenophorce and Cumacece. 



Points c, d and e were laid before the meeting, but were not discussed. 



Second Sitting: Thursday 25th April 1912. 



Chairman : Prof. Brandt. 



Present: Messrs. Ehrknbaum. Gilson, Gran, Green, Heincke, Henking, Hjort, Kramp, 



Kyle, Masterman, Ostenfeld, Paulsen, Redeke, Schultze, Thompson, Witting. 



Dr. Paulsen showed and described a new apparatus for measuring the vo- 

 lume of plankton samples by displacement (see: Meddelelser fra Kommissionen for 

 Havunders0gelser, Serie Plankton, Bind I. Nr. 11, 1912). 



Prof. Gran gave an account of a new method for quantitative plankton in- 

 vestigations and dealt with the importance of detailed investigations on the distri- 

 bution according to depth (see: Publication de Circonstance No. 62. 1912.). In the 

 discussion on this matter the following gentlemen took part: Messrs Brandt, Kyle, 

 Redeke, Thompson. 



Prof. Brandt described, in accession to the above, a method for investiga- 

 tion of the nannoplankton in a column of water by means of a pipe which is 

 let down to a certain depth whereafter the lower end of the pipe is drawn up. 

 The plankton in the column of water enclosed in the pipe may then be investigated 

 according to Lohmann's centrifugal method, so that the total quantity of the 

 plankton from the different parts of the column of water at a certain place is 

 obtained. 



Dr. Kyle's report from the Bureau was further discussed. Dr. Redeke stated 

 that Doliolum nationalis was present in great abundance in the southern part 

 of the North Sea in the autumn of 1911. This interesting fact was supposed to 

 arise from the extraordinary warm summer of 1911. 



Discussion of proposals for future work. 



Dr. Kyle proposed, in accordance with a resolution of the Plankton Com- 

 mittee at the meeting of 27.-28. May 1909 (Rapp. et Proc.-Verb. XII. Protocol of 

 the Plankton Committe, p. 80), that the naturalists in the different countries should 

 send in any doubtful specimens or samples to the Biological Department of the 



