THE BEGINNINGS OF II FE. 



139 



forms, many of which frequently occur together in the 

 same solution, depend upon the frequency with which 



Fig. 46. 

 Bacteria growing into Vihriones, Leptothrix, and Spirillm7i. ( X 1670.) 



a, a. Different kinds of Bacteria and Vibriones. 

 b, b, and c. Different kinds of Leptothrix filaments. 



d, d. Rudimentary Spirilla, some of which were ultimately seen to 



give rise to Fungus-mycelia. 

 e, e. Torula-like Bacteria developing into Fungus-mycelia. 



segmentation tends to occur, and upon the degree of 

 completeness of the process ^. Where the segmentation 



^ Speaking of these various forms, M. Ch, Robin says : — ' Les obser- 

 vateurs modernes les plus experiment's n'ont pas encore pu trouver des 

 caracteres specifiques et distinctifs reels, permettant de separer en plu- 

 sieurs especes les corps organises trfes-repandues design's ici, bien que 

 des vues theoriques ou des observations trop restreintes aient fait croire 

 le contraire.' ('Trait' du Microscope/ 1871, p. 929.) 



