DESCRIPTION OP PLATES. 



DESCRIPTION OF PLATE I. 



Bacteria, Schizomycetes, or Fission Fungi. 



Following p. 14. 



1. Cocci singly and varying in size. 2. Cocci in chains or rosaries (strepto- 

 coccus). 3. Cocci in a mass (staphylococcus). 4 and 5. Cocci in pairs 

 (diplococcus). 6. Cocci in groups of four (merismopedia). 7. Cocci in packets 

 (sarcina). 8. Bacterium termo. 9. Bacterium termo x 4000 (Dallinger and 

 Drysdale). 10. Bacterium septictemite hcemorrJiagicce. 11. Bacterium pneu- 

 monia crouposce. 12. Bacillus subtilis. 13. Bacillus murisepticus. 14. 

 Bacillus diphtherien. 15. Bacillus typhosus (Eberth). 16. Spirillum undula 

 (Cohn). 17. Spirillum volutans (Cohn). 18. Spirillum cholerce Asiatics. 

 19. Spirillum Obermeieri (Koch). 20. Spirocliceta plicatilis (Flugge). 21. 

 Vibrio rugula (Prazmowski). 22. Cladothrix Forsteri (Cohn). 23. Cladothrix 

 dichotoma (Cohn). 24. Nonas Okenii (Cohn). 25. Nonas Warmingii (Cohn). 

 26. Rhabdomonas rosea (Cohn). 27. Spore-formation {Bacillus alvei). 28. 

 Spore-formation (Bacillus anthracis). 29. Spore-formation in bacilli cultivated 

 from a rotten melon (Frankel and Pfeiffer). 30. Spore-formation in bacilli 

 cultivated from earth (Frankel and Pfeiffer). 31. Involution-form of Crenotkrix 

 (Zopf). 32. Involution-forms of Vibrio serpens (Warming). 33. Involution- 

 forms of Vibrio rugula (Warming). 34. Involution-forms of Clostridium 

 polymyxa (after Prazmowski). 35. Involution-forms of Spirillum cholerce 

 Asiatics. 36. Involution-forms of Bacterium aceti (Zopf and Hansen). 

 37. Spirulina-form of Beggiatoa alba (Zopf). 38. Various thread-forms of 

 Bacterium merismopedioides (Zopf). 39. False-branching of Cladatkrifo(Zopi). 



DESCRIPTION OF PLATE II. 



Pure-cultivations of Bacteria. 



Following p. 100. 



FIG. \.-ln the depth of Nutrient Gelatine. A pure-cultivation of Koch's 

 comma-bacillus (Spirillum cholerae Asiatics) showing in the track of 

 the needle a funnel-shaped area of liquefaction enclosing an air-bubble, 

 and a white thread. Similar appearances are produced in cultivations of 

 the comma-bacillus of Metchnikoff. 



FIG. 2. On the surface of Nutrient Gelatine. A pure-cultivation of Bacillus 

 typhosus on the surface of obliquely solidified nutrient gelatine. 



xxii 



