Index 



Motion, difference between plants 



and animals, 370. 

 Mule, transverse stripes in the, 



100. 

 Miiller, Erik; eye lens in the 



tritons, 28. 

 Miiller, G. E. ; stopping of a 



clock, 382. 

 Mus decumanus, Mus rattus, Mus 



sylvaticus, 90. 

 Myxomycetes, 29, 372. 



Nageli ; idioplasmic network, 

 230; unfolding of the anlagen 

 of the idioplasm, 239 ; Weis- 

 mann's objection, 242, 243; 

 general and mnemonic idio- 

 plasm, 255; the mnemonic 

 phenomenon, 316. 



Nature, former habit, 384. 



Navicula brevis, reaction to light, 

 372. 



Neal ; acclimatization, 372. 



Nerve cells, 262. 



Nervous energy, 29, 33, 41, 43, 

 45, 46, 48, 49, 50, 70, 77, 79, 86, 

 98, 256, 289, 299, 319, 33-332, 

 336, 340, 344, 357- Specific, 62- 

 63- 



Nervous coordinations, 45, 251, 

 252, 253. 



Nervous current, nervous flux, 

 32, 35, 36, 37, 39, 41-43, 102, 

 295- 297, 209, 300, 319, 322, 325, 

 346, 347, 348, 356; compared 

 with electric, 289-292; specific, 

 16, 102, 290, 374; oscillating, 

 34i ff. 



Nervous discharge, 41, 292 ff, 

 322, 342, 343, 346, 348, 352, 357- 



Neuters among the insects, 178, 

 187, 312. 



Newts, arrests of development 



of, 99; regeneration in, 19, 140. 

 Nisus formativus, 137. 

 Nostalgia, 383. 

 Nuclear division, 79, 83, 92, 132, 



246, 283, 350, 354- 

 Nuclear somatisation, 18, 24-26, 



27, 79, 83, 84, 89, 92, 119, 262, 



297, 299. 

 Nuclei, somatic and germinal, 84, 



85- 



Nussbaum ; division of Infuso- 

 ria, 54; form-determining en- 

 ergy, 59; continuity of the 

 germ cells, 189; inheritance* of 

 acquired characters, 190. 



Oilier ; transplantation of bony 

 tissues, 90. 



Omphalosite monsters, 113, 114. 



Ontogenetic stimulus, 51, 59, 94, 

 101, 306, 309. 



Optimum conditions, tendency 

 towards, 372. 



Orr; alteration of the nature of 

 growth, 96; crosses, 100; bio- 

 genetic theory, 251-256; com- 

 parison with the mnemonic 

 phenomenon, 316; vital phe- 

 nomenon, 332. 



Osborn; phagocytes, 49; influ- 

 ence of fasting on transforma- 

 tions, 50; adaptive reactions, 

 209; latency, 217; colors in 

 pleuronectids, 217. 



Osmotic currents, 270. 



Ostwald ; term "stationary," 361 ; 

 pleasure, 395. 



Overcrowding, effects of, 197. 



Ownership, sense of, 387. 



Pangenetic theory, 206. 



