xviii LIST OF ILLUSTRATIONS. 



104. Cholera spirilla. x 1000 . 404 



105. Cholera spirilla stained to show the terminal flagella. 



x 1000 ... . . 405 



1 06. Cholera spirilla from an old agar culture. x 1000 . 406 



107. Stab culture of the cholera spirillum . . . 408 



1 08. Colonies of the cholera spirillum in a gelatine plate ; three 



days' growth ... . 409 



109. MetchnikofPs spirillum. x 1000 . 426 

 no. Stab cultures of Metchnikoff's and of Finkler and Prior's 



spirillum . . . . . .427 



111. Finkler and Prior's spirillum from an agar culture. x 1000 428 



112. Influenza bacilli from a culture on blood agar. x 1000 . 431 



113. Bacillus of plague from a young culture. x 1000 . 437 



114. Bacillus of plague in chains. x 1000 . . . 438 



115. Spirilla of relapsing fever in human blood (after Koch). 



x about 1000 ...... 444 



1 1 6. Micrococcus melitensis, from a two days' culture on agar 



at 37 C. x 1000 ..... 449 



1 17. Bacillus icteroides, from a young culture on agar (Sanarelli). 



x 1000 ...... 454 



1 1 8. Culture of bacillus icteroides on agar, showing the char- 



acteristic appearance when incubated at the two tempera- 

 tures mentioned (Sanarelli). Natural size . . 454 

 119-124. From dried blood-films, showing parasites of malarial 



fever. x about i ooo . . . . .519 



125. Amoebae of dysentery ..... 528 



126. Section of wall of liver abscess, showing an amoeba of 



spherical form with vacuolated protoplasm. x 1000 . 530 



