XX11 DESCRIPTION OF PLATE I. 



32. Involution-forms of I'ibrio serpens (after Warming). 



33. Involution-forms of Vibrio rugula (after Warming). 



34. Involution-forms of Clostridium Polymyxa (after Prazmowski). 



35. Involution-forms of the Spirillum cholera Asiatics, from an artificial 



cultivation. 



36. Involution-forms of Bacterium aceti (after Zopf and Hansen). 

 37. Spirulina-form of Beggiatoa alba (after Zopf). 

 38. Various thread-forms of Bacterium merismopedioides (after Zopf). 

 39. False-branching of Cladothrix (after Zopf). 



