BACTERIOLOGY. 



are in certain cases very important as aids to 

 diagnosis, but are not so essential as the dif- 

 ference shown by the second type of endospore 

 discovered by Peters and L,. Klein. 1 In this 



i. 



Fig. 17. Endospore formation in flagellate, actively motile bac- 

 teria ; second type of spore formation (according to Klein) in 

 bacteria from stagnant water. 



1, B. Solmsii with protoplasm disintegrated by plasmolysis ; 

 in the lighter portions the protoplasm is drawn away and the 

 membrane alone shows. 



2, B. paludosum. 



3, Clostridium butyricum. 



.1-3 after drawings by A. Fischer, about i : 2000. 



(Fig. 17), there is an initial separation of the 

 protoplasm into a spore-forming and a spore-free 

 portion, so that from the beginning the spores 



1 Ber. d. Deutsch. Bot. Ges. 1889, vii - P- 57- 



