A COLOURED PARASITE 



25 1 



Australian fishes. Its structure and modes of pro- 

 pagation also have a distinct interest, for its tropho- 

 zoite is loaded with pigment (Fig. 47,/>.)> and not only 

 is spore formation common, but fission also occurs. 

 The trophozoites contain numerous granulations, 

 sometimes rounded, sometimes irregular. They are 

 distributed throughout the cytoplasm, and vary in 



FIG. 47 TROPHOZOITE OF CHLOROMYXUM 



ps., Pseudopodia; s., spore; p.c. t polar capsules ; p., pigment 

 masses 



colour from yellow to almost green (Fig. 47,^.)- The 

 exact nature of the colouring matter is not known, 

 but the pigment is in some cases perhaps derived 

 from the tissue or fluid in which the organism lives. 

 The spore (Fig. 47, s.) contains four polar capsules 

 instead of the usual two (Fig. 47, p.c.). 



Chloromyxum has been generally regarded as a 



