XIV CONTEXTS. 



GROUP II. BACTERIACE^E. 



Genus I. Bacterium . . . I 3 I 



II. Spirillum ... .137 



,, III. Leuconostoc .... 144 



,, IV. Bacillus ..... -146 



V. Vibrio .... .180 



,, VI. Clostridium . . . '*. " . .181 



GROUP III. LEPTOTRICHE^E. 



Genus I. Crenothrix . . . . . .184 



,, II. Beggiatoa . . . 185 



,, III. Phragmidiothrix . . ' . . . 187 



,, IV. Leptothrix . . - . . . .- .187 



GROUP IV. CLADOTRICHE^E. 



Genus I. Cladothrix , - ,. f .". . .188 



CHAPTER X. 



SPECIES OF SCHIZOMYCETES MENTIONED BY VARIOUS 

 WRITERS AND NOT DESCRIBED, OR NOT RECOG- 

 NISED AS DISTINCT SPECIES, IN THE PRECEDING 

 CLASSIFICATION .191 



APPENDIX. 



A. Yeasts and moulds ....'. . 222 



B. Examination of air . . . . . . . 232 



C. Examination of soil ....... 236 



D. Examination of water. . . . . " 237 



E. Literature . . . . . . .241 



F. Table showing the magnifying power of Zeiss' objectives . r . 243 



