166 PARASITIC PROTOZOA POUND IN 8. AFRICA. 



to the fresh state, as it was impossible to secure good, permanent 

 preparations with such a small quantity of material as occurs in 

 these very sparse infections. As far as I know, from the literature 

 at my disposal, Giardia have not been found in these hosts before, 

 and so, for purposes of reference, it seems well to give them new 

 specific names, though later they may be found to belong to species 

 already known. Doflefn in his "Protozoenkunde" states that 

 Giardia occurs in sheep. Particulars, so far as available, of these 

 two new rare Giardia are as follows : — 



Firstly, the Giardia occurring in the rumen and duodenum of 

 the ox, which I shall call Giardia bovis, gave body measurements 

 in its trophic form of 23/x by 13^, while a cyst measured 11-5/j. by 

 7p, taking long and short diameters in camera lucida drawings in 

 each case. 



Secondly, the Giardia found in the large colon of the horse, 

 which I name Giardia equi, gave measurements, correspondingly 

 taken, of 20/x by 10u for the flagellate stage. 



The interesting Proflagellate, Sehnomastix ruminantium, 

 which I recorded from goats last year, has now been found in the 

 rumen and reticulum of a sheep examined by me in Johannesburg 

 but coming from the Middelburg District, Cape Province. 



Sporozoa. 



Eimeria faurei was found by me in the intestines and faeces of 

 two sheep examined in Johannesburg. Gametocytes were observed 

 in the mucosa of the small intestine and the caecum, while oocysts 

 were present in the faeces. An oocyst measured was 33/x long by 

 23/* broad. 



A Leucocytogregarine has been observed in leucocytes of the 

 mononuclear type in a smear of the heart-blood of a reedbuck, 

 Redunca (Cervicajira) arundinum, for which preparation I have 

 pleasure in thanking Dr. Hertig, who made the smear for me in 

 Barotseland. 



An interesting Leucocytozoon has been observed in the leuco- 

 cytes of a bird known as Burchell's coucal, Centropus burchelli, 

 killed near Pietermaritzburg. I have much pleasure in thanking 

 Dr. E. M. Robinson for the preparations. The infected leucocytes 

 showed displacement of their nuclei and the ends of the cells were 

 slightly drawn out into short processes in some cases, though when 

 large parasites were present — and these were the most common — 

 the processes or "tails" of the host cells were not obvious. The 

 trophozoites were elongate, measuring about 13-3u by 5-3^. The 

 microgametocytes had pale staining cytoplasm but a rather large 

 nucleus. They vary in size from 7-3/x. to 13-3^ in length by 4-6/ 

 to 9u in breadth. The macrogametocytes had densely granular 

 cytoplasm and stained deeply. They are 12a to 14" long and 9-3/x 

 to 10u broad. Both macrogametocytes and microgametocytes may 

 have a certain amount of extra-nuclear chromatoid substance. 

 Schizogony occurs in the lungs and some apparent schizonts have 

 been seen in a smear of the peripheral blood. Free schizonts in a 

 lung smear measured 11/x by 10-6/x. Schizonts showing nuclear 



