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 septiccemice hcemorrhagicce . 11. Bacterium pneu- 

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

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

 (Cohn). 17. Spirillum volutans (Cohn). 18. Spirillum cholera Asiaticce. 

 19. Spirillum Obermeieri (Koch). 20. Spirochceta plicatilis (Fliigge). 21. 

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

 dichotoma (Cohn). 24. Nonas OJtenii (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 Crenothrix 

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

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

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

 AsiaticfB. 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 Cladothrix^Zopf). 



DESCRIPTION OF PLATE II. 



Pure-cultivations of Bacteria. 



Following p. 100. 



FIG. 1. In the depth of Nutrient Gelatine. A pure-cultivation of Koch's 

 comma-bacillus (Spirillum choleras Asiaticae) 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 tlie surface of Nutrient Gelatine. A pure-cultivation of Bacillus 

 typhosus on the surface of obliquely solidified nutrient gelatine. 



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