SOIL PROTOZOA IX SOUTH AFRICA. 



369 



Virgin Red Karroo Soil. 



Table VI 



It is seen, then, that two organisms only, namely, Oikomonas 

 termo and Lacrymaria olor, are common to each season. Amoeba 

 Umax occurs in spring (September) samples, but not in autumn 

 (April) collected soil. Different thecamoebae occurred. The 

 flagellate, Peranema trirhophornjn , was found in the April and 

 not in the September sample, but in the latter, large specimens of 

 Euglena- oiridis occurz-ed, but were absent from the April sample. 

 There was then a marked difference between spring and autumn 

 protozoal faima in Virgin Red Karroo soil. 



Cultivated Red Karroo Soil. 



Tarle VII 



From Table VII it is seen that two Protozoa oceiir in soil 

 samples taken in both spring and autumn, namely, the flagellates, 

 Oikomonas termo and Bodo (P.J parva. The remaining Protozoa 

 differ widely from one another. In autumn there are more kinds 

 of Flagellates present in Cultivated Red Karroo soil than in spring. 

 Apparently a different protozoal fauna may be expected in spring 

 from what is present in autumn. 



