PI.ATE VII. 



Mastigamoeba sp., x 800, 

 Acinetadis mirabilis, x 800, 

 Monosiga steinii, x 1500, 

 Trcpomonas agilis, x 800, 



32 

 32 

 35 

 36 



A)itJwphysa vegetans, a free-swimming cluster, x 500, 33 



A)ii/iop/iysa vegetans, a branched colony, x 320, - 33 



Codosiga botrytiis, x 1200, - - - - 34 



Heteroniita sp., x 1300, ----- 35 



