INDEX. 
Propagation, sexual, i. 195: 
= — virginal,- i, 197 
Protamnia, ii. 289, 295 
Protamcebe, ii. 52 
Prothallophytes, ii. 80, 97 
Prothallus plants, ii. 80, 97 
Protista, ii. 48 
Protophyta, ii. 82, 85 
Protoplasma, i. 185, 330 
Protoplasts, li. 51, 53 
Protozoa, ii. 121, 131, 132 
Purpose in nature, i. 19 
Purposelessness in nature, i. 20 
R 
RaDIATA, ii. 120 
Radiolaria, i. 333, 371 ; ii. 65 
Rapacious animals, ii. 240, 260 
Recent system, ii. 15 
Reptiles, ii. 222, 224 
Rhizopoda, ii. 51, 61 
Ringed worms, ii. 149, 150 
Rodentia, ii. 241, 257 
Romans, ii. 323, 331 
Rotatoria, ti. 149, 150 
Rotifera, ii. 150, 152 
Round worms, ii. 149, 150 
Rudimentary eyes, i. 13 
gristle, i. 12 
legs, i. 14 
lungs, i. 289 
mammary glands, 
i. 290 
muscles, i. 12 
nictitating membrane, 
13 
organs, i. 12 
pistils, 1. 15 
stamens, 1. 15 
tails, i. 289 
teeth, i. 12 
wings, i. 287 
s 
Sack worms, ii. 283, 295 
Sauria, ii. 222 
Schaaffhausen, i. 110 
Schleicher, August, i. 108; ii. 301 
Schleiden, J. M., i. 109 
Science, i. 9; ii. 335 
Scolecida, ii. 283, 295 
Sea stars, ii. 164, 166 
— cucumbers, ii. 166, 171 
407 
Sea dragons, ii. 204 
— lilies, ii. 166, 177 
nettles, ii. 141, 144 
urchins, ii. 166, 171 
Secondary period, ii. 14, 20 
Selection esthetic, i. 268 
——— artificial, i. 152, 170, 254 
homochromic, i. 263 
medical, i. 173 
military, i. 171 
musical, i. 267 
natural, i. 168, 255 
psychical, i. 269 
sexual, i. 265 
—_— Spartan, i. 170 
Self-division, i. 191 
Semites, ii. 322, 330 
Serpents ii. 223 
Sexes, separation of, i. 244 
Sexual characters, i. 209, 265 
Silurian system, ii. 8, 14 
Slavonians, li. 323, 331 
Snails, ii. 159, 160 
Soul, the, i. 71, ii. 343, 362 
Species, i. 41, 273, 304, 311 
Specific development, i. 311 
Spencer, Herbert, i. 119; ii. 367 
Sperma, i. 197 
Spiders, i. 180, 182 
Spirobranchia, ii. 157, 160 
Sponges, ii. 139, 144 
Spores, formation of, i. 194 
Stemmed plants, ii. 280 
Straight-haired men, ii. 309, 314 
Struggle for life, i. 161, 252 
Synameeba, ii. 125, 280 
Systematic development, i. 313 
System of animals, ii. 132 
————— apes, ii. 270 
Arabians, ii. 330 
arachnida, li. 182 
Arians, ii. 331 ~ 
arthropoda, ii. 132 
articulata, ii. 177, 183 
catarrhini, ii, 270 
——— ceelenterata, ii. 144 
crustacea, ii. 176 
didelphia, ii, 239 
echinoderma, ii. 166 
Egyptians, ii. 330 
fishes, ii. 208 
formations, ii. 15 
————. Germans, ii. 331 
——— gilled Insects, ii. 177 
