Joupnal of Miepogcojp^, 3p3. Sep,, Vol, 7, P 



Heterodbba Radicicola (highly magnified). 



Fig. 1, Female cyst -.—(a) mouth, (b) stomach, (c) ovaries, (d) oviducts, (e) vulva. Fig. 2, Exserti 

 spear. Fig. 3, Eggs in various stages of development ; (n) nucleus. Fig. 4, Development of embry( 

 Fig. 5, Worm (larval stage) emerging from egg: Fig. 6, Commencement of change from larval to cyst 

 stage. Fig. 7, More advanced development of male. Fig. 8, Female from larval to cystic stage. 



