'Tf 



^Vlthi 



^'^ their. 



ectet 



^ ^' be det 

 '■^'°d, but it 



^^^ contained,, 



'^^^^' a crowd f,i 



5 



Tfli 



i 



"g^^t which 



But there ti! 

 1^5 whose hi 

 other organiii 

 E was for a tii '' 



;es undergone l|| 



at last M. Pifla 

 the midst of; 



n 



? to the largest e 

 lisdecilsgrosi: 



: des Oxytrif •; 



lent lents, 



I 



* 



tai 



) 



Formaiei'4 ^ 



lie 



5 formaieii 

 elle qui 



c 



^tiereni 





TUB BEGINNINGS OF LIFE, 



495 



M 



rOxytrique parfait.' After these observations 



felt compelled to believe that the rotating embryos seen 





Fig. 90. 

 Transformations of Ciliated Infusoria. (Pineau and Haime.) 



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



Oxytricha. (Pineau, X 265,) 

 l 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- 

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

 seen some of the stages of a similar transformation ^ 

 We now know, moreover, that a Vorticella and an 

 Oxytricha may result from the transformations of two 



r 



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

 Silliman's * American Journal/ August, 1871. 



