X THE MICROSCOPE. 



FIG. PAt^B 



12. Filament of a species of Oscillatoria, a plant .... 60 



a. Poi'tion more highly magnified. 



13. Pandorina Morum, a plant 60 



14. Volvox Globator, a plant 60 



15. Euglena viridis, a plant, showing various forms 



which it assumes 61 



16. AmceTja, an infusory sitoimalcule 69 



a, h, c, show the various forms which this ani- 

 malcule assumes ". 



17. ActinopJirys Sol, the sun animalcule 62-69 



18. Difflugia, an infusory animalcule 63 



19. Arcella, an infusory animalcule 63 



20. Lagena, a species of Foraminifer 69 



21. Polystomella crispa, a species of Foraminifer 69 



22. Globigerina, a species of Foraminifer 69 



23. Ptosalina, from chalk, a Foraminifer 69 



24. Living Rosalina, a Foraminifer g9 



25. Texiilaria, a species of Foraminifer 69 



PLATE II. to face page 32. 



26. Uha in different stages of development gj 



a. Cells in single series. 



6. Commencement of lateral extension. 



c. Portion expanded. 



27. Cosmarium, a species of Desmid undergoing self- 



division. 



28. Euastrum, a species of Desmid 57 



29. Closterium, a species of Desmid *• 57 



a. Undergoing self-division. 



30. Desmidium, a species of Desmid 57 



