382 son- protozoa in south africa. 



Mastigophora. — Bodo (Prowazekia) parva, Oikomonas 

 (Monas) termo, Euglena oxyuris, Euglenoids. 



Infusoria. — Paramoecium aurelia, Paramoecium piitri- 

 iiiDii, Cyclidium glaucoma. 



Cedara. — Three samples of soil from Cedara Agricultural 

 College were examined in water culture. 



(i) Black vlei soil, obtained near Cedara Station, the sample 

 ■comprising all the layers to a depth of nine inches below the sur- 

 face. It was collected during rain on 3rd October. Its reaction 

 to litmus was acid. In water culture the following Protozoa were 

 ■obtained : — 



Mastigophora. — Oikomonas (Monas) termo. 

 Infusoria. — Paramoecium aurelia, Stylonychia mytilus, 

 Euplotes harpa, Euplotes patella. 

 (ii) Dolerite soil under cultivation, from the experimental 

 plot at the School of Agriculture. This was a mixed sample of all 

 the layers to nine inches from the surface and was collected on 

 3rd October, during rain. Its reaction to litmus was acid. The 

 following Protozoa were found in water culture: — 

 Rhizopoda. — A moeba Umax. 

 Mastigophora. — Oikomonas termo, Bodo (Prowazekia) 



parva, Euglena viridis. 



Infusoria. — Holophrya ovum, Colpoda cucullus, Cyclidium 



glaucoma. 



(Hi) Dolerite soil, uncultivated, obtained near the tennis 



•court of the School of Agriculture, about nine inches from the 



surface, on 3rd October, during rain. It gave an acid reaction to 



litmus. The following Protozoa were found in water cultures: — 



Rhizopoda. — A moeba Umax, A moeba sp. with tetranu- 



cleate cyst. 

 Mastigophora. — Oikomonas (Monas) termo, Bodo (Pro- 

 wazekia) parva. 

 Infusoria. — Colpoda cucullus, Cyclidium glaucoma . 

 It may be noted that a greater variety of Protozoa occurred 

 in water cultures of cultivated as compared with uncultivated 

 •dolerite soil, more especially among Infusoria. Black vlei soil here 

 yielded Protozoa not found in the dolerite soils. 



Durban Botanic Gardens. — This was a mixed sample of soil 

 •containing some sand collected under a mango tree, and consisted 

 of all the layers of soil from the surface to twelve inches deep. 

 It was collected on 21st September, on a hot day. Its reaction to 

 litmus was acid. 



In water culture, one organism only was obtained, the Helio- 

 ■zoon, Actinophrys sol, which was fairly numerous for a few days. 



Geographical Distribution. 



The geographical distribution of the different species of Pro- 

 tozoa found up to the present may be summarised thus: — 



