INDEX OF SUBJECTS 



Lamprey, ectoplasm of egg of, loo 



Life-molecule, 5 



Linear arrangement of the genes, 322 



Lingula, ectoplasm in egg of, 93 



Lipins, 39, S3, 54 



Living and non-living, similarities in, 



IS 

 Living things, limitation of investiga- 

 tion, 3 

 organization of, 2 

 physico-chemical systems, i 

 Loligo, egg of, 301 

 Lunar periodicity, 158 

 Lysin, 232 



M 



Mactra, egg of, 97, 153, 223 



Mammals, ectoplasm of eggs of, loi 



Mathematics, use of in science, 25 



Maturation, 148 



Mayonnaise, 62 



Measurements in biology and physics, 



3 

 Mechanistic, use of term in biology, 14 



Median plane, 300 



Medicine, 364 



Medusa-egg, 177 



Membrane, 70-74, 140 



nuclear, 50 



plasma, 72, 140 



precipitation, 73 



semi-permeable, 140 



synaptic, 120 



vitelline, 72, 140 

 Mevibranipora, ectoplasm in egg of, 93 



egg of, 203 

 Mendel's laws, 321 

 Merogony, 180, 297, 315, 318 

 Mesoderm, 288 

 Methods of investigation in biology 



and physics, 3 

 Micropyle, 201 \—[X> 

 Middle-piece of spermatozoon, 171 ff. 

 Migration of cells in tissue-culture, 



85-86 

 Mitochondria, 56 



Mitosis, 250 



Mitotic figure, 59, 240 



Models in biology, 16, 62, 271 



Monaster-stage, 341, 351 



Morula, 301 



Multicellular organism, history of, 36 



Muscle-cells, ectoplasm in, 78-81 



Mutations, 321, 340, 352 



Mytilus, egg of, 97-98 



middle-piece of sperm of, 183 

 Myzostoma, egg of, 153 



N 



Nematodes, ectoplasm in eggs of, 92 



Nephritis, 139, 365 



Nereis, egg of, 24, 53, 54, 55, 56, 59, 

 64, 97, 102, 108, 113, 116, 

 129, 134, 135, 138, 139. 153, 

 177, 186, 194, 19s, 233. 231, 

 269, 278, 303, 309, 317, 



341, 347 



Nerve-cells, ectoplasm in. 81-85 



Nerve-systems, 358 

 Non-mechanistic, 14 

 Normal egg, 177 

 Normal living organism, 17 

 Nuclei, size of, 49 

 Nucleic acid in bacteria, 31 

 Nuclein, 312 

 Nucleolus, 50 

 Nucleo-protein, 41, 51 

 Nucleus, 8, 31, 51 



chemistry of, 51 



form of, 49 



ground-substance in, 70 



origin of, 357 



resting, 51 



role of, in differentiation, 308 ff. 

 Nutrition, 139, 358 



animal and plant. 360 



O 



Oedema, 139, 365 



Oil, function of, in cell, 54 



Oniscus, 66 



Opalina, 33 



/ 



J) 



'■^# 



3S9 



