188 



INDEX. 



Diatomaceae, 75. 



, fossil, 82. 



, markings on, 81. 



, preparation of, 82. 



Dichotomous, 67. 

 Dicotyledons, leaves of, 



35. 



, seeds of, 43. 



, stems of, 35. 

 Dicranum, 57. 

 Differentiation, 47. 

 Dimidiate, 55. 

 Dinobryina, 160. 

 Dinobryon, 160. 

 Dioecious, 38. 

 Dipping-tubes, 4. 

 Diptera, 137. 

 Dispersion, 178. 

 Division, spontaneous, 



159. 



Dothidea, 108. 

 Dragon-flies, 145. 

 Draparnaldia, 71. 

 Dry rot, 98. 

 Ducts, 27. 

 Dung-beetle, 132. 

 Dytiscus, 148. 

 Eccremocarpus, seeds of, 



42. 



Echinodermata, 153. 

 Echinus, 153. 

 Elbowed, 149. 

 Elder, 25. 



Elements, vegetable, 19. 

 Elytra, 147. 

 Emarginate, 146. 

 Embryo, 42. 

 Embryo-sac, 46. 

 Embryonal vesicles, 46. 

 Enchelys, 161. 

 Encysting, 159. 

 Endogenous, 29. 

 Endogens, leaves of, 35. 

 seeds of, 44. 

 stems of, 44. 

 Enteromorpha, 87. 

 Entomostraca, 127. 

 Entozoa, 151. 

 Ephemera, 145. 

 Epidermis, animal, 117. 



, vegetable, 31. 



Epithemia, 77. 



