ILLUSTRATIONS ix 



79. Aspergillus fumigatus 368 



80. Trichophyton tonsurans from a calf 370 



81. Ameba meleagridis 382 



82. Piroplasma bigeminum in the red blood corpuscles 385 



83. Blood in a capillary of the heart showing Piroplasma 



bigeminum in the red corpuscles 385. 



84. Piroplasma parvum 390 



85. Piroplasma mutans 390 



86. Trypanosoma Evansi from rat's blood 397 



87. Trypanosoma equiperdum from guinea pig 399 



88. Trypanosoma Brucei from rat's blood 401 



89. Trypanosoma Brucei in blood of a rat 401 



90. Trypanosoma equinum from blood of a mouse. . . . 403 



91. Trypanosoma Americanum 404 



92. Treponema anserina from the blood of a goose 407 



93. Spirochaetes. from the lesions in the diseased skin of a 



pig 410 



94. Various stages in the flexions and transverse divisions of 



Treponema gallinarum 411 



95. Life cycle of Treponema gallinarum illustrated diagram- 



matically 412 



96. Negri bodies in nerve cells 419 



97. Sarcocysts in muscle 426 



98. Coccidium oviforme from a rabbit's liver 429 



99. Coccidium oviforme in the section of a rabbit's liver 430 



100. Diagrams illustrating the production of antitoxin and 



lysis 462 



101. Complement fixation with glanders 476 



