160 PATHOGENIC BACTERIA. 
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Fic. 91.—Some of the principal forms assumed by the 
Hematozoon of tertian fever in the course of its cycle of 
development (after Thayer and Hewetson). 
preparations, or in Ehrlich-Biondi fluid' for one- 
half hour. 
Fic. 92.—Crescentic and flagellated forms of Hematozoon 
malarie : 1, flagellated form of tertian fever; 2, flagellated 
form of quartan fever ; 3, crescents, and 4, flagellated form 
of estivo-autumnal fever (after Thayer and Hewetson). 
1 See Appendix, page 173. 
