VI THE MICROSCOPE. 



FIG. PAGE. 



15. Euglema viridis, a plant 43 



16. Amoeba, an iufusory animalcule 44-51 



17. Actinopkrys Sol, the sun animalcule 45-51 



18. Difflugia, an infusory animalcule 45 



19. Arcella, an infusory animalcule 45 



20. Polystomella, a species of foraminifer 51 



21. Textilaria, a species of foraminifer 51 



22. Rosalina, from chalk, a foraminifer 51 



23. Living Rosalina, a foraminifer 51 



PLATE II. 



24. Ulva in different stages of development 44 



a. Cells in single series. 



6. Commencement of lateral extension. 



c. Portion expanded. 



25. Euastrum, a species of Desmid 40 



26. Closterium, a species of Desmid 40 



27. Desmidium, a species of Desmid 40 



28. Pediastrum, a species of Desmid 40 



29. Scenedesmus, a species of Desmid 40 



/ 30. Surirella nobilis, a species of Diatom 41 



31. Pinnularia viridis, a species of Diatom 41 



32. Melosira varians, a species of Diatom 41 



33. Coscinodiscus eccentricus, a species of Diatom 41 



34. Paramecium aurelia, an infusory animalcule 46 



35. Vorticella nebulifera, an infusory animalcule 45 



36. Rotifer vulgaris, a wheel animalcule 47 



37. Stomates on a portion of cuticle of hyacinth leaf . . 18 



38. Sinuous walled cells and stomates from under sur- 



face of leaf of water-cress 18 



