102 



SYMBIOSIS. 



much and become club-shaped or dichotomously branched 

 bodies without power of division, which may be designated 

 " bacteroids/' l Brunchorst found the contents of the bacteroids 



FIG. 23. Rhizobiiim leguminonarum. Root-tubercles oil Rdbinia. Fseudacacia 



(v. Tubenf phot.) 



to disappear at the time of the fruit-formation of the host- 

 plant. A small number of microbe-bodies still remain, according 

 to Frank's observations, capable of division, and these, after 



According to Moller, they undergo fatty degeneration. 



