4i 



f^ 



240 



T7/B BEGINNINGS OF LIFE. 



notions concerning credibility and the mode in which 

 living matter ought to conduct itself, rather than ade- 

 quately investigate the subject for themselves. 



According to Pouchet, the stages in the evolution of 

 'Paramecium vlrlde were as follows : — The pellicle which 

 was at first uniform and evenly granular, after a short 





I 







o 



y 





o\. 



A O 





•'"^ 



Fig. 63. 



Mode of Origin of Paramecia from the ' Pellicle,' after Poucliet. 



(X 400.) 

 time changed in aspect here and there, owing to a 



' _ w 



concentration of its granules at tolerably equal dis- 

 tances into small more or less rounded aggregations 

 which soon became surrounded and defined by a clear 



w 



border, suggestive of a resemblance to the zona ^el- 

 luctda of higher animals. The next change which took 





I 





Iv bear 



■ifested its e 

 f oscillatic 



....'1 



■'"in 



m 



uniform 



'^Hi withii 



se of many 



^ stage im! 



i^- 1 time, a 



I 



parte 



Ml 



ilatation 



■!;i 



n* 



'* 



