332 



SOME PAKASITIC TliOTOZOA FOUND IX SOUTH 

 AFRICA.— V. 



BY 



H. !5. F.WTiiAM, M.A. Cantab.. D.Sc. Lond. 



Professor of Zoologij, University of ilie Witicatersrand, 



Johannesburg. 



Bead July 13, 1922. 



Abstract. 



In this paper are concisely recorded the results of my con- 

 tinued investigations on some parasitic Protozoa found in the 

 South African sub-continent. The mode of work is as previously 

 recorded, and the term " parasite " is used in a wide and general 

 sense. The measurements of the organisms given were deter- 

 mined in the same manner as stated last year (this Journal, 

 Vol. XVIII, pp. 164-170) and as followed in previous communica- 

 tions of this series. 



Attention may be drawn to the Protozoa found infecting 

 cabbage, to the experimental infection of a rat with Herpeto- 

 ■ni())ias muscie domesiicce, to remarks on the natural occun-ence 

 f>f that flagellate, and to the finding of a Herpetomonas in soil. 

 Also, the study of seasonal periodicity in the occvu-rence of Sarco- 

 sporidia has been continued, and the occiuTcnce of Rhinosporidium 

 in man in Soutli Africa is recorded. 



Sarcodina. 



An interesting Amceba was seen one day in April iu fresh 

 rectal scrapings of a Xcnopus Icevis. The amoeba, though not 

 very active, had a wrinkled appearance, with numerous short 

 pseudopodia, twelve to fifteen in number, one of which was 

 somewhat filiform and longer than the rest. The body was 30^i 

 to 35^ in diameter. The nucleus, which was excentric, had a 

 relativeW large karyosome. This amoeba, though somewhat 

 small, was of the A. verrucosa type, and may have got into the 

 rectum of the frog from the outside via the mouth, and so may 

 be an example of what has been called a " passenger." 



A small amoeba of the A. gvitula type, but only about 12ji 

 in diameter, was found in a cabbage stalk, somewhat strong 

 smelling, taken from the fodder room of an animal house in 

 Johannesburg. The organism was slow-creeping, showing' one 

 blunt pseudo])odium only at a time. Unfortunately, the amoebte 

 were very few in number, and tliey were only observed in the 

 fresh state. 



