740 11. M, WOODCOCK. 



Figs. A-D. — Trypanosoma fringillinaruni, as found in the birds. 

 For description of these figures see under figs. 2, 3, 28. and o4. wliich are 

 of the same individuals respectively. [In the reproduction the whole 

 length of the delicate aflagellar prolongation, which is visible in the 

 actual i^hotos, cannot be made out. Unfortunately there are two small 

 pieces of debris lying on the parasite of fig. b. which are, of course, 

 reproduced. One lies about one third of the distance from the kineto- 

 nucleus to the ti-ophonucleus ; the other on the fold of the membrane 

 opposite to the nucleus. In the drawn figure (fig. 3) these particles are 

 omitted.] 



Figs. E-G. — Agglomeration clusters of various sizes of T. frin- 

 gillinaruni in cultures. [The parasites of the first two clusters 

 are not so nicely stained, unfortunately, as those of the third, but they 

 show the manner of formation of the cluster.] 



Fig. H. — Halteridium fringillai; female individual showinff 

 nuclear dimorphism (the same is drawn in fig. 14). 



Fig. J. — Fertilisation of a macrogamete by a microgamete. Note 

 that the latter is penetrating by the end which has the centrosoniic 

 granule. 



Figs. K and L. — Microgametes. 



