XIV CONTENTS 



Genus V. Thiothece Winogradsky 846 



Genus VI. Thiocystis Winogradsky 846 



Genus VII. Lamprocystis Schroeter 847 



Genus VIII. Amoebobacter Winogradsky 848 



Genus IX. Thiopolycoccus Winogradsky 860 



Genus X. Thiospirillum Winogradsky 850 



Genus XI. Rhabdomonas Cohn 853 



Genus XII. Rhodothece Molisch 855 



Genus XIII. Chromatium Perty 856 



Family II. Aihiorhodaceae Molisch 861 



Genus I. Rhodopseudomonas Kluyver and Van Niel emend. Van 



Niel 861 



Genus II. Rhodospirillum Molisch 866 



Family III. Chlorobacteriaceae Geitler and Pascher 869 



Genus I. Chlorobium Nadson 869 



Genus II. Pelodictyon Lauterborn 870 



Genus III. Clathrochloris Geitler 872 



Genus IV. Chlorobacterium Lauterborn 872 



Genus V. Chlorochromatium Lauterborn 873 



Genus VI. Cylindrogloea Perfiliew 873 



Order II. Actinomycetales Buchanan 875 



Family I. Mycobacteriaceae Chester 875 



Genus I. Mycobacterium Lehmann and Neumann 876 



Family II. Actinomyceiaceae Buchanan 892 



Genus I. Nocardia Trevisan 892 



Genus II. Actinomyces Harz 925 



Family III. Streptomycetaceae Waksman and Henrici 929 



Genus I. Streptomyces Waksman and Henrici 929 



Genus II. Micromonospora Prskov 978 



Order III. Chlamydobacteriales Buchanan 981 



Family I. Chlamydobacteriaceae Migula 981 



Genus I. Sphaerotilus Kiitzing 982 



Genus II. Clonothrix Roze 983 



Genus III. Leptothrix Ktitzing 983 



Family II. Crenothricaceae Hansgirg 987 



Genus I. Crenothrix Cohn 987 



Family III. Beggiatoaceae Migula 988 



Genus I. Thiothrix Winogradsky 988 



Genus II. Beggiatoa Trevisan 990 



Genus III. Thiospirillopsis Uphof 993 



Genus IV. Thioploca Lauterborn 993 



Appendix: Family Achromatiaceae Massart 997 



Genus I. Achromaiium Schewiakoff 997 



Genus II. Thiovulum Hinze 999 



Genus III. Macromonas Utermohl and Koppe 1000 



Appendix : Order Caryophanales Peshkoff 1002 



Family I. Pontothricaceae Peshkoff 1002 



Genus I. Pontothrix Nadson and Krassilnikow 1002 



Family II. Arthromitaceae Peshkoff 1002 



Genus I. Arthromitus Leidy 1002 



Genus II. Coleomitus Duboscq and Grass^ 1003 



