588 Physiologie. — Algae. 



presence of free oxygen, while Pozzi-Escot further demon- 

 strates that, under proper conditions, in a great excess of 

 reductase an oxidase may be „paralyzed". This he believes to 

 be, not a proces of combustion, but the temporary combination 

 of the two enzymes which eliminate them for the time being. 

 In considering the physiological role of reductases, their action 

 on H2 O2 is taken as the most important, both in the processes 

 of respiration and of photo-synthesis. In the latter regard 

 taking Erlenmeyer's formic acid theory as a point of depar- 

 ture the anthor constructs the following formula 



co,+h»o o = c<^4-™h c02 + H20 o-c<U+{J;g; 



2H2 O2 = 2H 2 + O2. 

 The above is given as purely hypothetical, with the expla- 

 nation that the catalytic properties of the reductases,*» their 

 abundance in all growing organs, the more than probable for- 

 mation of hydrogen peroxide, and its harmful action, may 

 Support the idea. H. M. Richards (New York). 



ANONYMUS. Bureau du conseil permanent internatio- 

 nal pour l'exploration de la mer: Bulletin des resul- 

 tats acquis pendant les courses periodiques. Annee 1903 

 -1904. No. 2. Novembre 1903. No. 3. Fevrier 1904. 

 Copenhague (Host & fils) 1904. 4°. g. 63 — 146. 



No. 2 of the Bulletin for 1903—1904 contains plankton-tables from : 



1. North-Atlantic Ocean, August 1903 (determined by O v e 

 Pau 1 s e n). 



2. Bay of Bothnia, Bay of Finland, Baltic, Novembre 1903 

 (K. M. Levander). 



3. Baltic and Skagerrak, Nov. 1903 (P. T. C 1 e v e). 



4. Danish Seas (Kattegat and Belts), Nov. 1903 (C. H. Osten- 

 2 '■ d). 



5. North-Sea, Nov. 1903 (C. Apstein, J. P. van Breemen, 

 G. Gilson, R. Clark). 



6. English Channel, Nov. 1903 (L. Gough). 



7. Murman Sea, Nov. 1903 (P. T. Cleve). 



No. 3 of the Bulletin contains lists from about the same regions, 

 viz. : 



1. Bay of Finland, Baltic, Febr. 1904 (K. M. Levander). 



2. Baltic and Skagerrak, Febr. 1904 (P. T. Cleve). 



3. Danish Seas, Febr. 1904 (C. H. Ostenfeld). 



4. Baltic, North Sea (C. Apstein). 



5. North Sea (J. P. van Breemen, G. Gilson, R. Clark). 



6. English Channel (L. Gough). 



The States to whose Cooperation in the Study of the Sea the above 

 mentioned plankton-lists are due, areBelgium, Denmark, England, 

 Finlaud; Germany, Holland, Russia, Scotland and Sweden. 



C. H. Ostenfeld. 



LEMMERMANN, E., Beitrag zur Kenntniss der Plankton- 

 algen. XIX. Das Phytoplankton der Ausgraben- 

 seen bei Plön. (Forsch. Ber. Biol. Stat. Plön. T. XI. 

 1904. p. 289—311.) 



Das Material ist von G. Zacharias vom 3. März bis zum 

 10. August gefischt. Verf. giebt eine zusammenfassende Darstellung 



