XXX11 



INDEX. 



ages, i. 137; M. Saussure on, i. 

 T 39; growth of, ii. 27; occurrence 

 of heterogenesis in, ii. 317. 



Plastide-particles, i. 267, 270. 



Plastides, i. 152, 267. 



Polarity, Herbert Spencer on or- 

 ganic, ii. 23, 94 ; its operation in 

 higher organisms, ii. 595 ; an ever- 

 potent cause of form and struc- 

 ture, ii. 601. 



Pouchet, M., on vital force, i. 248 ; 

 on spontaneous generation, i. 263; 

 interchangeability of forms of 

 Fungi, ii. 151 ; heterogenesis and 

 vitalism, ii. 180; origin of Monads, 

 ii. 196 ; of Paramecia, ii. 240; of 

 Vorticellae, ii. 471 ; atmospheric 

 germs, ii. 275 ; apparatus for 

 showing connection of Ciliata 

 with Pellicle, ii. 300. 



Pringsheim, Prof., on transformations 

 in Algae, ii. 3 74. 



Prit chard, on Algae and their allies, 

 ii. 160; modes of succession of 

 organisms in infusions, ii. 502 ; 

 variations in habitat of Infusoria, 



ii- 535- 



Progressive development, ii. 583, 

 588, 590, 602. 



Protamcebae, i. 117, 121, 125. 



Protista, i. 115-126 ; divisions of, i. 

 117; modes of reproduction 

 amongst, i. 116, 192, ii. 548. 



Protococcus, relation of, to Algae, 

 Lichens, and Mosses, ii. 163 ; pro- 

 ducts of transformations of, Ixxxii. 



Protomyxa, process of reproduction 

 in, i. 193. 



Protonema, changes of, Ixvi-lxxii. 



Protoplasm, properties of, i. 127; 

 independent origin of, ii. 31, 77. 



Protoplasta, i. 153; development of 

 germs in, i. 197. 



Psorosperms, ii. 352,cxxii. 



Puerperal Fever, cxxxiv. 



Pyaemia, cxxxiv. 



Rainey, Mr., on ' molecular coal- 

 escence,' i. 51 ; on formation of 



Calculi, ii. 60; nature of starch- 

 grains, ii. 66. 

 Redi, on spontaneous generation, i. 



257. 



Reissek, Prof., on metamorphoses 

 of Chlorophyll corpuscles and 

 pollen-grains, ii. 432. 



Reproduction, act of, best sign of 

 life of Bacteria, i. 320; funda- 

 mental nature, ii. 91 ; limitations 

 of process in complex organisms, 

 ii. 95 in Rotifers, ii. 522 ; sexual 

 mode of evolution of, ii. 548, 

 552; ultimate nature of, ii. 561; 

 sexual modes, commencement of, 

 ii. 564; nature of ' alternate ' pro- 

 cesses of, ii. 565. 



Reproduction, different modes of, 

 'fable facing ii. 552. 



Reproductive units, mode of origin 

 of, i. 169-214, 232. 



Robin, Charles, on independent 

 origin of Leucocytes, i. 220 ; 

 blood-change in parasitic dis- 

 eases, ii. 361. 



Rotifers, resolution of, into Actino- 

 phrys and Peranema, ii. 484 ; 

 into Arcellinre, ii. 486 ; origin of 

 Ciliated Infusoria from eggs of, 

 ii. 488 ; modes of analytic hetero- 

 genesis in, ii. 489 ; heterogenetic 

 modes of origin of, ii. 501-523; 

 reproduction in, ii. 522, 549. 



Rumford, Count, heat as a mode of 

 motion, i. 7. 



Samuelson, Mr. James, on atmo- 

 spheric germs, ii. 280. 



Sanderson, Dr. Burdon, effect of 

 desiccation on Bacteria, ii. 5 ; 

 Microzymes in air, ii. 7 ; experi- 

 ments on inoculability of Tuber- 

 cle, cxiv. 



Sang de rate, M. Davaine on, ii. 362. 



Sarcina, i. 286 ; nature of, iii ; pro- 

 ducts allied to, v ; bodies resem- 

 bling, in silicated solution, xiv. 



Schaaffhausen, Prof., on heterogene- 

 tic transformations, ii. 453, 499. 



