XX Ml 



I N D EX. 



ages, i. 137; M. Saussure on 



I 39' growth of, ii. 27; occurrenc 



of heterogenesis in, ii. 317. 



l'l;i>tide-particles, i. 267, 270. 



1'lastides, 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 

 intei changeability of forms o 

 Fungi, ii. 151 ; heterogenesis and 

 vitalism, ii. 180; origin of Monads 

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

 Vorticellz, ii. 471 ; atmospheric 

 germs, ii. 375 ; apparatus for 

 showing connection of Ciliata 

 with Pellicle, ii. 300. 

 Pringsheim, Prof., on transformations 



in Algae, ii. 374. 



Pritchard, on Algae and their allies, 

 ii. 160; modes of succession of 

 organisms in infusions, ii. 502 ; 

 variations in habitat of Infusoria, 

 535- 

 Progressive development, ii. 583, 



588, 590, 602. 



Protaraoebae, 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 Algse, 

 Lichens, and Mosses, ii. 163 ; pro- 

 ducts of transformations of, Ixxxii. 

 Protomyxa, process of reproduction 



m, i. 193. 



Protonema, changes of, Ixvi -Ixxii. 

 Protoplasm, properties of, i. 127; 



independent origin of, ii. 31, 77 

 Protoplasta, i. 153; development of 



germs in, i. 197. 

 Psorosperms, ii. 3 5 2,cxxii. 

 Puerperal Fever, cxxxiv. 

 Pyaemia, cxxxiv. 



Rainey, Mr., on 'molecular coal- 

 escence,' i. 51 ; O n 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, 

 55 2 ; ultimate nature of, ii. 561; 

 sexual modes, commencement of, 

 " 5^4 ; nature of ' alternate ' pro- 

 cesses of, ii. 565. 

 Reproduction, different modes of, 



Table facing ii. 552. 

 Reproductive units, mode of origin 

 of, i. 169-214, 232. 

 bin, 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 Arcellinae, 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. 

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

 ducts allied to, v ; bodies resem- 

 bling, in silicated solution, xiv. " 

 chaaffhausen, Prof., on heterogene- 

 tic transformations, ii. 453, 499. 



