LIST OF ILLUSTRATIONS 



FIG. PAGE 



1. Amoeba proteus 15 



2. Amoeba polypodia 18 



3. Quadrula, Hyalosphenia, Arcella, Difflugia .... 20 



4. Forms of Foraminifera 22 



5. Shells of Foraminifera 25 



6. Actinophrys sol ......... 26 



7. Actinosphierium eichhornii 27 



8. Forms of Heliozoa . . . . . . . . 29 



9. Liteocircus annularis 31 



10. Actinomma asteracanthion 32 



11. Collozoum inerme ......... 33 



12. Euglena viridis 35 



13. Forms of Mastigophora 37 



14. Forms of Choanoflagellata 39 



15. Forms of Dinoflagellata 40 



16. Noctiluca miliaris . 41 



17. Volvox globator . . . 43 



1 8. Paramoecium caudatum 47 



19. Forms of Ciliata ......... 49 



20. Forms of Tentaculifera . . . . . . . .51 



21. Forms of Ciliata 53 



22. Vorticella ., . . 54 



23. Monocystis agilis . . 56 



24. Gregarina -57 



25. Ovum of a sea-urchin 60 



26. Diagram of maturation and fertilization of ovum . 6l 



27. Segmentation of the oosperm 62 



28. Forms of epithelium ........ 64 



29. Diagram illustrating the structure of glands .... 65 



