436 



BULLETIN 387 



FlG. IO4. SECTIONS OF CABBAGE ROOT HAIRS SHOWING AMOEBAE 



A, An amoeba dividing by fission in a root hair. B, A much distorted and swollen root hair, with 

 a small amoeba partly surrounding its nucleus, which is also much enlarged. C, An amoeba near the tip 

 of a root hair; the nucleoli are elongated, as they ordinarily are just before nuclear division. D, A root hair 

 filled with meronts. E and F, Amoebae in epidermal cells of the root and at the base of root hairs; amcebae 

 about to break up into spores. G, A root hair filled with an amoeba. H, A root hair filled with amoebae 

 breaking up into spores; the vacuolar channels between each nucleus are plainly visible. X 600 



