THE BEGINNINGS OF LIFE. 



495 



I'Oxytrique parfait.' After these observations M.' Pineau 

 felt compelled to believe that the rotating embryos seen 



FIG. 90. 

 Transformations of Ciliated Infusoria. (Pineau and Haime.) 



a-i. Representing stages by which Vorticellae became converted into 



Oxytricha. (Pineau, X 265.) 



k and /. Trichoda, seen laterally and from its under surface, such as was 

 seen to result from the transformation of other specimens of 

 Oxytricha. (J. Haime, X 750.) 



within the Vorticella cysts had, by a further metamor- 

 phic process, been converted into these embryo Oxy- 

 trichae, and Mr. T. C. Hildgard has, of late, apparently 

 seen some of the stages of a similar transformation 1 . 

 We now know, moreover, that a Vorticella and an 

 Oxytricha may result from the transformations of two 



1 See 'Monthly Journal of Microsc. Sc./ Dec. 1871, p. 281, and 

 Silliman's ' American Journal,' August, 183:1. 



