THE MORPHOLOGY OF BACTERIA 15 



constrictions and become elongated Monilia-like forms ; later, 

 the roundish gonidia become abstricted, and separate from the 

 parent chain as seen in Fig. 7, B. In Cladothrix dichotoma, 

 multiple segmentation occurs within the sheath, and oval 

 gonidia are produced which escape from one pole of a fila- 

 ment, either as motile swarm spores, or as simple non-motile 



FIG. 7. Showing formation of gonidia. 



A. Streptothrix bovis after Lehmann-Newmann. B. Streptothrix chromogena after Mace. 

 C-D. Crenothrix Kiihniana after Zopf ; c microgonidia, ? macrogonidia. E. Gonidial 

 bodies in Mycobact. tuberculosis after A. Coppen Jones. 



bodies as seen in Fig. 3, A. In Crenothrix Kiihniana, the pro- 

 cess is the same as in the preceding, except that there are two 

 classes of gonidia, the larger macrogonidia, as in Fig. 7, D, and 

 the smaller microgonidia, as in Fig. 7, C. Gonidia germinate 

 by the simple elongation of the cell, which by continued growth 

 develops into a vegetative filament. 



