PARASITIC PROTOZOA FOUND IN SOUTH AFRICA. 1 87 



Trypaiiosonies have been found in the blood of several kinds 

 of fish and birds. The fish were ehiefly obtained from Kalk 

 Bay, and the birds from various ])arts of the Transvaal. The 

 blood of the bamboo fish. Box salpa, contains a small trypano- 

 some, the body being about 29/* long and 2^ broad. It has a 

 large nucleus near the flagellar end, a small, fairly tightly con- 

 tracted membrane and a small free flagellum. Another smal' 

 trypanosome occurs in the blood of Dcntcx aryyrocona. It has a 

 pointed non-ilagellar end. and a small free flagellum. A distinct 

 basal granule can be seen, situated halfway between the blepharc)- 

 plast and the commencement of the flagellar border of the 

 undulating membrane. The body of the trypanosome is about 

 20.6/x long, with a free flagellum of 2^. while the breadth of the 

 body is about 1.3/u. A narrow trypanosome with a well-marked 

 undulating membrane is present in the blood of a barbel. Clarias 

 garicpiiius. from Mooi River, Natal. It may be T. barbi, Brumpt, 

 1906. Some specimens h?.d a body length of 32.6//. with a breadth 

 of i-Sfi, the free flagellum measuring 2/x. 



Two trypanosomes have been observed in the blood and 

 internal organs of the dikkop. Gobius nudiceps. One is larger 

 and more abundant than the other. They also differ morpholo- 

 gically. The larger trypanosome, for which I propose the pro- 

 visional name Trypanosoma niidigobii, may measure from 6oju 

 to 85/x. long, the breadth varying from 6.6/a to ySp- The body 

 tapers markedly at both ends, and the endoplasm is very granular. 

 The membrane is usually contracted close to the body. The free 

 flagellum is short. Well-marked myonemes are present on the 

 body, and are usually ten in number. The nucleus is oval, pale- 

 staining, extending across the short diameter of the body. The 

 blepharoplast is small, rounded, and is often enclosed in a clear 

 area. The smaller trypanosome. provisionally named T. capigobii, 

 has a narrow body with very pointed extremities. It measures 

 from 42ju, to 60ju, long, and from 2/;. to 4.4/x, broad. Five 

 myonemes are usually present on the body. The nucleus is 

 centrally situated, and its long axis is parallel to the long axis of 

 the body of the trypanosome. The blepharoplast is round and 

 distinct, and the membrane arises near a basal granule. 



The red-headed weaver finch, Anmdina erythrocephala, is 

 parasitised by a trypanosome. having a body about 34.9/i long and 

 6.4/x broad, wnth a close membrane, and a free flagellum about 3.3/x 

 long. A " crithidial " form of this trypanosome has been seen, 

 which probably represents a stage in retrogression of the flagel- 

 lum and concentration of the body substance during the early 

 stages of the formation of the resting or leishmaniform stage. 



The blue-breasted waxbill, variously named Urccginthiis or 

 Estrilda {Estrelda) angalcnsis, harbours a trypanosome possess- 

 ing a narrow body with a pointed non-flagellar end. The undulat- 

 ing membrane is w^ell marked, shows large waves, and has dis- 



