DESCRIPTION OF PLATE3. xi 



FIG. PAGE 



31. Pediastrum, a species of Desmid 57 



32. Scencdcsmus, a species of Desmid , . . . . 57 



S3. Surlrella nobilis, a species of Diatom 59 



34. Pinnularia viridis, a species of Diatom 59 



35. a. Navicula, a species of Diatom undergoing self- 



division 

 &. Front view of the same. 



36. Melosira varians, a species of Diatom 59 



37. Melosira nummuloides undergoing self-division . ... 59 



38. Coscinodiscus eccentricus, a species of Diatom 58 



39. Paramecium Aurelia, an iufusory animalcule 64 



40. Vorticella nebulifera, an infusory animalcule 63 



41. Rotifer vulgaris, a wheel animalcule 65 



42. Stomates on a portion of cuticle of hyacinth leaf .. 32 



43. Sinuous walled cells and stomates from under sur- 



face of leaf of water-cress 32 



44. Cuticle of wheat straw with stomates 33 



45. Cuticle from petal of geranium (Pelargonium). ... 33 



46. Cuticle from leaf of a species of aloe 33 



47. Spiral vessel from leaf-stalk of garden rhubarb .... 35 



48. Ditto unrolled 35 



49. Annular vessel from wheat root 35 



50. Dichotomous spiral vessels 35 



51. Dotted duct from common radish * . . . 35 



52. Scalariform tissue from fern root 35 



53. Woody fibre from eider.. % ... 35 



