Figure 5. Several small species of unicellular organisms, all drawn to ten 

 times the linear scale of the preceding figure. 12. Actinophrys sol (pseudo- 

 podia amputated). 13. Polytoma uvella. 14. Saccharomyces cerevisiae. 

 15. Chilomonas Paramecium. 16. Pleurococcus vulgaris. 17. Trypanosoma 

 lewisi. 18. Micrococcus progrediens. 19. Bacillus coli. 20. Bacillus ramosus. 



