170 



Gust. Alsterberg 



3) The temperature exercises no effect upon the length that cannot be ex- 

 plained on other grounds. 



4) The displacement of water follows the variations of the rhythm with a 

 temperature-quotient 2'4. 



5) Thus alterations of temperature exercise a specific effect that cannot be 

 assumed to be due to increased need for 0 2 . 



6) As the temperature was regulated very carefully in the previously men- 

 tioned series of 0 2 experiments, it is inconceivable that it has had any significance 

 upon the main shaping of their results. 



Thus it has been the aim of this investigation to make a simultaneous study 

 of the cecological character of the habitat and the reciprocal adaptations of the or- 

 ganisms examined, in contrast to other investigations respecting animals from the 

 sapropelic domain, in which the animal has been simply separated from its habitat, 

 the latter being almost or completely ignored. 



(Ausgedruckt ara 15. Mai 1922.) 



