THE BEGINNINGS OF LIFE. 



139 



forms, many of which frequently occur together in the 

 same solution, depend upon the frequency with which 



\ 



d 



FIG. 46. 

 Bacteria growing into Vibriones, Leptotbrix, and Spirillum. (X 1670.) 



a, a. Different kinds of Bacteria and Vibriones. 

 b t b, and c. Different kinds of Leptotbrix filaments. 



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



give rise to Fungus-mycelia. 

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



segmentation tends to occur, and upon the degree of 

 completeness of the process 1 . Where the segmentation 



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

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

 caracteres sp^cifiques et distinctifs reels, permettant de s6parer en plu- 

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

 des vues thdoriques ou des observations trop restreintes aient fait croire 

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



