X THE MICROSCOPE. 



PIO. PAGE 



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



a. Portion more highly magnified. 



13. Pandorina Morum, a plant 60 



14. Volvox Glolator, a plant 60 



15. Euglena viridis, a plant, showing various forms 



which it assumes 61 



16. Amoeba, an infusory animalcule 6$ 



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

 malcule assumes 



17. Actinophrys Sol, the sun animalcule 62-09 



18. Difflugia, an infusory animalcule 03 



19. Arcella, an infusory animalcule 63 



20. Lagena, a species of Foraminifer 09 



21. Polystomella crispa, a species of Foraminifer 69 



22. Globigerina, a species of Foraminifer 69 



23. Rosalina, from chalk, a Foraminifer 69 



24. Living Eosalina, a Foraminifer (59 



25. Texlilaria, a species of Foraminifer $<j 



PLATE II. to face page 32. 



?fi . Ulva in different stages of development Qi 



a. Cells in single series. 



J. Commencement of lateral extension. 



c. Portion expanded. 



27 Cosmarium, a species of Desmid undergoing self- 

 division. 

 23. Eaastrum, a species of Desmid. 57 



29. Closterium, a species of Desmid 57 



a. Undergoing self-division. 



30. Des'/nidium, a species of Desmid ....... 57 



