INDEX. 201 



Mitosis (Chap, viii.) anaphase, 113, 114 ; prophase, 103, et seq. ; metaphase, 

 112, 113; telophase, 114; formation of cell-plate, 114, 115; origin 

 of achromatic spindle, 106, 115 ; origin of primary chromosomes, 104 ; 

 spireme stage, 104 ; dispireme stage, 114; monaster stage, 106 ; 

 diaster stage, 113; Centrosomes in, 103, 115; mantle- fibres, 106, 

 112 ; Chemotaxis in, 106, 113. 



Mimosa, Sensative leaf of, 185. 



Mohl, von, Primordial utricle of, 15. 



Monaster stage, see Mitosis. 



Monocotyledons, Arrangement of tissues in stems of, 4, 52 ; Disposition 

 of bundles in stems of, 52 ; Presence of cambial zones in stems of, 53. 



Mosses, Reproduction in, 145 ; Vascular elements of, 80. 



Motae ceUs, 2, 89, 96, 97, 132, 142, 144, 149, 151 ; Action of electric currents 

 upon, 188. 



Mougeottia, Rotation of Chlorophyll band in, 182. 



Movements, of protoplasts (naked), 2, 8, 10; of protoplasm in a cell, 11, 

 15 ; Geotropic, 184 ; HeMotropic, 181 ; of variation, 185 ; of swarm- 

 spores, 11, 95 ; of smaU particles in Spirogjrra, 92 ; of ciha, 97. 



Mucilage, in sieve-tubes, 62. 



Multicellular formation, 101, 129. 



MyceHum, 89, 147. 



Myxomycetes, 8. 



N 



Nagbli, theory of constitution of cell-wall, 45. 



Nettle, Stinging hairs of, 33. 



Nitrogen, J^similation of, 18, 158, 169 ; Conversion of, by bacteria, 158, 



173 ; forma in which N enters plant, 33, 171, 173, 174. 

 Nitrates, Absorption of, 173, 174 ; formed by bacteria, 173. 

 Nitrifying bacteria, 158, 173. 



Nitrites, Absorption of, 33, 173 ; formed by bacteria, 158, 173. 

 NuceUus, 121, 132. 

 Nuclear membrane, see Nucleus. 

 Nuclear plasm, see Nucleus. 

 Nuclear spindle, see Mitosis. 

 Nuolein, see Chromatin. 



Nucleus, i, 7, 15, 101, 102, 103 ; Structure of quiescent, 15, 101, 102, 103 ; 



Changes in, during mitosis, 103, et seq. ; Linin-network of, 101. 

 Nutation, 184. 

 Nyotitropism, 185. 

 Nymphsea, Idioblasts in, 86, 87. 



Octants, see Embryo. 



00, in Vaucheria, 93 ; in higher plants, 78, 79, 159, 160, 176 ; in fungi, 



89 ; -glands, 78, 79. 

 Oogonium, of Vaucheria, 151 ; of ferns, 142 ; of Fuous, 149 ; of fungi, 147. 



