PLATE V 
Spirochaeta duttoni 
Figs. I, 2.—Spirochaetes shewing chromatic areas. 
Fig. 3.—Irregular distribution of chromatin. 
Figs. 4, 5.—Swellings in the spirochaete. 
Fig. 6.—Unstained transverse band. 
Fig. 7, 8.—Stages in transverse division 
Fig. 9.—Longitudinal division. 
Fig. 10.—Conjugation (?). 
Fig. 11.—Intracorpuscular spirochaete. 
Fig. 12.—Coiled form in the peripheral blood. 
Fig. 13.—Swollen form in the liver. 
Figs. 14, 15.—Skein-like forms in the spleen. 
Fig. 16.—Encysted form. 
