264 LORANDE LOSS WOODRUFF 
13. There is some evidence that the relative potential of divi- 
sion of the various forms may have an appreciable influence on 
the sequence of the maxima. 
14. Emphasis is pit upon the strictly biological interrelations 
(e.g., those involving food and specific excretion products) of the 
various forms as the most important determining factors in the 
observed sequence. 
15. The observations suggest that conjugation will be found to 
be a means resorted to by many species to survive acute changes 
in the environment, which, for example, preclude encystment. 
