BACTERIA 



93 



sists simply of a swelling of the spore, then the formation of a small rod 

 which issues from the spore and forms a septum for itself (Fig. 71, 15 

 and 16). As soon as the spore germinates, the nucleus ceases to exist 

 as a morphologic entity; it is scattered in the cytoplasm in the form of 

 Uttle grains. 





■ ■•■! \ ' i. • > \' 1 



'■vv '^ O^J l«/ I5/ W '^ ' J 

 7 8 9 10 II 12 13 14 



F1G.71. — Bacillus biilschlii. 1-16, Vegetative cells and their division. 7-9, Begin- 

 ning of spoTuIation: the cells about to sporulate are partitioned off crosswise; then 

 the^septum thus formed is absorbed, at which time sporulation begins. 'Schaudinn 

 considers this partitioning off followed by fusion of the two daughter cells as a rudi- 

 mentary sexuality. 10-13, Formation of the beginnings of the two spores, at the 

 poles of the cell. 14, Ripe spores. 13-16, germination of the spore. (After 

 Schaudinn.) 



In another bacillus smaller in size {B. sporonema), Schaudinn has 

 found an analogous structure only at the time of sporulation; he does 

 not prove the formation of an axial filament but only the condensation 

 of a portion of the chromatic grains into a large granule which forms the 

 beginning of the spore (Fig. 72). 



By the fact that in these two bacilli the beginning, of the spores 

 appears as a granule equivalent in some respects to a nucleus and 

 resulting from the condensation of a portion of the stainable grains, 

 Schaudinn is led to believe that these grains are composed of chromatin 

 and represent a kind of diffuse nucleus. 



