/ N D EX. 



xxix 



Medusae, direct development of some 

 explained, ii. 571. 



Metamorphosis (see Transforma- 

 tion). 



Meunier, M. Victor, experiments of, 

 with bent-neck flasks, ii. 8. 



Micrococci, Prof. Hallier, i. 283. 



Milk-globules, conversion of, into 

 fungus-germs, ii. 310. 



Milne-Edwards, M., on Pansper- 

 mism, ii. 271. 



Mites, probable mode of origin of, 

 ii. 540 ; reproduction in, ii. 551. 



Mivart, Mr. St. G., on cause of or- 

 ganization, ii. 583 ; on internal 

 tendencies to, ii. 60 1. 



Molecular composition, nature of 

 bodies dependent upon, ii. 49. 



Monads, description of, i. 267 ; evo- 

 lution of, ii. 196, 388 ; origin of, 

 in pellicle, ii. 196, 212, 214; 

 interchangeability of Amoebae 

 and, ii. 218; origin of, from 

 embryonal spheres of Nitella, ii. 

 402 ; from chlorophyll corpuscles, 

 ii. 409 ; from outgrowths of Eu- 

 glense, ii. 436 ; resolution of Eu- 

 glenae into, ii. 440. 



Monera, growth and reproduction 

 of, i. 153. 



Montgomery, on cell-forms assumed 

 by Myeline, i. 52. 



Mosses, origin of, from Confervae, 

 ii. 452 ; observations of M. de 

 Brebisson on, ii. 454 ; relations of, 

 to Lichens and Algae, Ixiii-lxvi. 



Moxon, Dr., on fission of Ciliated 

 Infusoria, ii. 291. 



Mucous membranes, development of 

 organisms on, ii. 345. 



Miiller, O. F., on spontaneous gen- 

 eration, ii. 179. 



Mumps, cxxxix. 



Murchison, Dr., on origin of fevers, 

 cxl. 



Murphy, Mr., on origin of species in 

 wild state, ii. 598. 



Muscardine, nature of, ii. 324-330. 



Muscle, contractility of, i. 26 ; 

 mode of action of, i. 30; source 



of power in contraction of, i. 33, 



54- 

 Mushrooms, cultivation of, ii. 433. 



Nai'des, a probable origin of, ii. 540. 



Natural Selection, ii. 107 ; Mr. Dar- 

 win on, ii. 572 ; meaning of 

 phrase, ii. 572-576; limitation to 

 influence of, ii. 573; two mean- 

 ings of, ii. 574, 600. 



Nectarine, convertibility of, and 

 Peach, ii. 596, 598. 



Needham, on spontaneous genera- 

 tion, i. 258; theory of life, ii. 174. 



Nematoidea, development of ova 

 in, i. 200 ; origin of, from Eu- 

 glenae, ii. 466 ; transformation of 

 Actinophrys into, ii. 525; mode 

 of origin of, from resting-spore of 

 Vaucheria, ii. 529; reproduction 

 in, ii. 532. 



Nerve activity, source of heat during, 

 i. 40. 



Nervous system, constituents of, i. 

 35 ; functions of, dependent on 

 blood-supply, i. 37; persistence 

 of function after apparent death, 



i- 37- 



Neurility, i. 36. 



Newport, Mr., on vital forces, i. 1 7. 



Nicolet, on germ-formation in Amoe- 

 bae, i. 197; modes of origin of 

 Amoebae and Actinophrys, ii. 382 ; 

 mode of origin and transforma- 

 tions of Trichomonas, ii. 384 ; 

 transformations in Chara fila- 

 ments, ii. 474 ; heterogenetic ori- 

 gin of Rotifers, ii. 509 ; on Amoe- 

 bae, xc. 



Nitella, transformations in, ii. 399 ; 

 transformations of Chlorophyll 

 corpuscles of, into Monads and 

 Amoebae, ii. 407 ; formation of 

 embryonal spheres in, ii. 400 ; 

 their transformations into Bacte- 

 ria and Pythium corpuscles, ii. 

 401 ; into Monads, ii. 402; into 

 Amoebae and Actinophrys, ii. 404 ; 

 into Ciliated Infusoria, ii. 494; 



