70 THOUGHTS ON ANIMALCULES. 



Ehrenberg, detected in the young upon which the pre- 

 ceding observations were made. 



I was unable to watch the further progress of the 

 young Stephanoceros. It is probable, that, after a short 

 term of freedom, it becomes fixed by the base, and 

 passes through successive stages of development to ma- 

 turity*. 



* The observations described in the text were made while suffering 

 under a severe indisposition, which ultimately compelled me to abandon 

 the investigation. It was my intention to renew it under more favourable 

 circumstances, but, as this has hitherto been impracticable, this imperfect 

 notice is inserted, in the hope of inducing other observers to follow up the 

 inquiry. 



