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EXPLANATION OF PLATE XXII. 
All figures drawn with Abbe camera lucida, using 2 mm. 
apochromatic objective and 12 compensating ocular (Zeiss). 
Magnification 1800 diameters approximately. 
Figs. 1-20.—Rhodesian strain of human trypanosome. Figures 
drawn from parasites in the blood of rats, except where 
otherwise stated. 
Fig. 1.—Stout form with nucleus median. 
Figs. 2-8. — Stout and stumpy forms, each with posterior nucleus. 
The nucleus is seen gradually to become more posterior, 
till it lies behind the blepharoplast (fig. 9). 
Fig. 10.—Posterior nuclear form with line connecting blepharoplast 
and nucleus. 
big. 11.—Posterior nuclear form becoming rounded. 
Fig. 12.—Posterior nuclear form showing division. 
Figs. 13-17. — ‘Snout’ forms. (Figs. 13, 15 from rat’s blood, figs. 
14, 16, 17 from man.) 
Figs. 18, 19.—Forms with terminal blepharoplast. 
Fig. 20. — Multiple division form, with four blepharoplasts and two 
nuclei. Such parasites are not uncommon in the 
Rhodesian strain. 
Figs. 21-25.—Various trypanosomes drawn from the blood of rats 
infected with the old laboratory strain of T. gambiense. 
