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16 corpuscular parasites prior to the formation of spores, may sometimes be seen to slip out from their enclosing corpuscles (Fig. 9, b, e). If these free parasites are watched, in some instances the hæmozoin they contain is seen to indulge in violent dancing movements, the body of the parasite being at the same time agitated and jerked about. Finally, "flagella" (microgametes) may be suddenly projected from the periphery (Fig. 9, c, f), very much in the same way as they are projected from the periphery of the crescent-derived sphere. Manifestly, these large

Fig.—9. a, b, c, Evolution of the flagellated body in tertian fever; d, e, f, evolution of the flagellated body in quartan fever

spherical parasites and the flagellated bodies arising from some of them correspond to the crescent-derived sphere and crescent-derived flagellated body.