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EXPLANATION OF PLATE 15. 
All figures were outlined with Abbé-Zeiss camera lucida, using 2-mm. apochromatic 
homogeneous immersion objective and compensating oculars 8 and 12 of Zeiss. Magnifica- 
tion 2000 diameters approximately, except where otherwise stated. 
The chief stains used were iron hematoxylin, Giemsa, or Romanowsky after wet 
fixation. 
The figures represent 7. rhodesiense, as seen in rats, except where otherwise indicated. 
Fig. 1 represents the formation of latent (non-flagellate) body from trypanosome in 
heart blood. 
Figs. 2—5 represent latent bodies, with remains of trypanosomes around or near, from 
heart (fig. 4) and lungs. 
Figs. 6, 7.—Oval latent bodies, each with nucleus and blepharoplast (kinetonucleus), from 
lung of rat and peripheral blood of guinea-pig respectively. | 
Figs. 8—16.—Various forms of latent bodies—from liver, heart, spleen, lung (figs. 8—11); 
of 7. gambiense in peripheral blood of rat (fig. 12); from peripheral blood (fig. 13), 
lung, and heart respectively. 
Figs. 17—20.—Rounding, herpetomonad-like forms, all from peripheral blood of guinea- 
pigs. Fig. 19 of 7. gambiense. 
Fig. 21.—Broad trypaniform parasite from blood of guinea-pig. 
Fig. 22.—Latent form of 7’. gambiense from lung of rat. 
Figs. 23, 24.—Possible division forms of latent bodies of 7. rhodestense from heart and 
lungs of rats. Fig. 24 magnified 1350 diameters. These forms are rare. 
Figs. 25, 26.—Pyriform latent bodies, each with nucleus and blepharoplast. Fig. 25, of 
T. rhodesiense from blood of guinea-pig ; fig. 26, of 7. gambiense from blood of rat. 
Figs. 27, 28.—Pyriform bodies of 7. rhodestense and T. gambiense (fig. 28) from peripheral 
blood of guinea-pig. In fig. 28 the flagellum is shown beginning to develop. 
Figs. 29, 30.—Two pyriform non-flagellate forms from spleen of rat. 
Fig. 31.-—Round form of 7. gambiense, with nucleus, blepharoplast and short flagellum 
along the edge of the body; from peripheral blood of rat. 
Figs. 32—40.—Crithidia-like forms. Fig. 32, of 7. gambiense from blood of rat; figs. 
33—35, of 7. rhodesiense from lung (fig. 33) and peripheral blood of rat; figs. 36—38, of 
T. gambiense from blood of guinea-pigs; figs. 39, 40, of 7. rhodestense from blood of 
guinea-pigs. In fig. 37 note the basal granule (“blepharoplast” of Minchin) at the 
root of the flagellum, forming the centrosome of the kinetonucleus. 
