1. _Micrococcus ureae_ (Cohn). (Pasteur.) 2. " _fulvus_ (Cohn). 3. " _prodigiosus._ 4. " _ureae liquefaciens._ 5. _Bacterium sulphureum._ 6. " _coli commune._ (Fig. 15.) 7. " _coli anindolicum._ 8. _Bacterium coli anaerogenes._ 9. " _furfuris_ α (Wood). (Fig. 30.) 10. " _furfuris_ β (Wood). (Fig. 31.) 11. _Bacillus fluorescens putridus._ 12. " " " _liquefaciens._ 13. " _subtilis._ 14. " _saprogenes_ (Herfeld), three varieties. 15. " _butyricus_ (Hueppe). (Fig. 23.) 16. " _putrificus._ (Fig. 19.) 17. " _pyocyaneus._ 18. " _janthinus._ 19. " _coprogenes fœtidus._ 20. " _pyogenes fœtidus_ (a variety of _B. coli_). 21. " _zenkeri._ 22. " _magnus._ 23. " _spinosus._ 24. " _liquefaciens_ (Eisenberg, Frankland). 25. " _amylobacter_ (Van Tieghem). 26. " _acidi paralactici._ 27. " {I. } Isolated from horse manure by Severin, 28. " {II. } Centr. Bl. f. Bakt. (2), i., 97. 29. " {III.} 30. " from horse dung (anaerobic) Severin, Centr. Bl. f. Bakt. (2) iii., 708. 31. " from horse dung (anaerobic), No. 3, ditto. 32. " _oedematis maligni_ (Vibrion Septique, Pasteur). 33. " _mesentericus vulgatus._ 34. " _lactis aerogenes._ 35. " _cavicida_ (Brieger). 36. " _albuminis_ (Bienstock). 37. " _Bienstockii._ 38. " _tenuis._ 39. " _enteritidis sporogenes_ (Klein). 40. " _lactis acidi_ (Ankerschmid, 1905). 41. " _megatherium._ 42. " _cadaveris sporogenes_ (Klein) said to be identical with No. 16. 43. " _thermophilus._ (Houston). 44. " _a._ from puer. See p. 162. 45. " _b._ " " " 47. _Bacillus mycoides._ 48–61. 14 species isolated from dog and pigeon dung by Prof. H. Becker. Zeit. f. Offentlich. Chemie. Heft xxiii. Jahrgang X. p. 447, includes _B. erodiens_ (Fig. 16). 62. _Sarcina fimentaria_ (Lehmann and Neumann). 63. _Streptococcus_ from sewage. (Houston.) 64. " _brevis._ 65. " _longus._ 66. " _pyogenes._ 67. " _liquefaciens coli._ (Gamgee Phys. Chem. 2.) 68. _Streptothrix_ from stable manure. (Severin, 6.) 69. _Spirillum serpens_ (Kutscher). 70. " _tenue_ " 71. " _undula_ " 72. " _volutans_ " (Figs. 24 and 25). 73. " from pig dung. Smith, Centr. Bl. f. Bakt. 16, (1), 124 74–76. _Vibrio_, three species isolated by Kutscher. 77. _Clostridium butyricum_ (Prazmowski), said to be identical with No. 25. 78. _Streptococcus faecalis._ Sidney Martin, 37 and 38; Ann.