l88 PARASITIC PROTOZOA FOUND IN SOUTH AFRICA. 



tmct myonemes. The body measures about 34/x long and 2.611 

 broad, and the free flagellum is about 2.6/x long. 



Sporozoa. — Representatives of this group have been observed 

 by me in a number of vertebrates. 



A. CocciDiiDEA. — Eimeria stiedae has been found in a number 

 of rabbits in South Africa, and unless treatment, such as by my 

 catechu method, were provided, the infected animals often died. It 

 is probable that there are several strains of E. stiedcc in South 

 African rabbits, the strains varying somewhat in virulence, and 

 the organisms dififering only slightly in size. 



An Eimeria has also been observed in the stomach and 

 intestine of an albacore, Seriola lalandii, from Kalk Bay. 

 Gametocytes and oocysts were seen, and its life-cycle is under in- 

 vestigation. Oocysts, as found in faeces, measured 33/1 to 40/* 

 by 15/X to 20/U, and each contained four sporocysts. Two sporo- 

 zoites developed in each sporocyst on keeping. 



B. HyEMOspoRiDiA. — Thcsc iuclude haemogregarines, 

 leucocytogregarines and halteridia. 



Haemogregarines have been found in the blood and organ 

 smears of various fish from Kalk Bay, lizards fr^ m the Cape 

 Peninsula, and birds from the Transvaal. Among fish, haemo- 

 gregarines were found in the blood of the panga,' Pagrus lani- 

 ariiis ; the harder, Mugil capito ; and the Hottentot fish, Cantharus 

 hlochii. The parasite of the panga, Pagrus laniarius, was vermi- 

 cular, occupied a large portion of the host erythrocyte and nearly 

 surrounded its nucleus. A schizont with a dozen nu^'lei was also 

 seen. One harder, Mugil capita, contained a small, somewhat 

 globular ha^iogregarine, and a rounded schizont containing six 

 nuclei, three of which were in process of a second division into 

 two, was observed. The blood of the Hottentot fish, Cantharus 

 hlochii, also contained a haemogregarine. It was present as a 

 broad, sausage-shaped, free vermicule, with a broad band-like 

 nucleus extending across the breadth of the body. The vermicule 

 measured 10.6//, long and 4.0/* broad. Multiplicative forms, so 

 far, have not been observed. 



Haemogregarines were found in the blood and organs of 

 several specimens of the small lizard, Mabuia varia. In some 

 cases, fairly heavy infections were found. In the -blood, the 

 infected erythrocytes showed enlargement and nuclear displace- 

 ment. Small intracellular vermicules were 9.3/^ long and 3/x, 

 broad ; large ones were up to 20/i, long and 5|U, broad. A cytocyst 

 was sometimes found around intracellular forms. Free vermi- 

 cules, measuring from i3.3iu. to 22,fi long, and from 2.6/^ to 

 6/x broad, were found in the blood. Schizogony into two was 

 found in a few cases in smears of heart blood, and schizogony 

 into two and four merozoites occurred in the liver, spleen and 

 kidney of the host. More than four merozoites have not been 

 observed at present. 



A haemogregarine has been found in the blood of the red- 

 headed weaver finch. Amadina erythroccphala. It was present in 



