INDEX. 



407 



Propagation, sexual, i. 195 



virginal, i, 197 



Protamnia, ii. 289, 295 

 Protamoeba!, ii. 52 

 Prothallophytes, ii. 80, 97 

 Prothallus plant.s, ii. 80, 97 

 Protista, ii. 48 

 Protophyta, ii. 82, 85 

 Protoplasma, i. 185, 330 

 Protoplasts, ii. 51, 53 

 Protozoa, ii. 121, 131, 132 

 Purpose in nature, i. 19 

 Purposelessness in nature, i. 20 



E 



Eadiata, ii. 120 

 Eadiolaria, i. 333, 371 ; ii. 65 

 Eapacious animals, ii. 240, 260 

 Eecent system, ii. 15 

 Eeptiles, ii. 222, 224 

 Ehizopoda, ii. 51, 61 

 Einged worms, ii. 149, 150 

 Eodentia, ii. 241, 257 

 Eomans, ii. 323, 331 

 Eotatoria, ii. 149, 150 

 Eotifera, ii. 150, 152 

 Eound worms, ii. 149, 150 

 Eudimentary eyes, i. 13 



gristle, i. 12 



legs, i. 14 



lungs, i. 289 



mammary glands, 



i. 290 



muscles, i. 12 



nictitating membrane, 



i. 13 



organs, i. 12 



pistils, i. 15 



stamens, i. 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 



Sea dragons, ii. 204 



lilies, ii. 166, 177 



nettles, ii. 141, 144 



urchins, ii. 166, 171 



Secondary period, ii. 14, 20 

 Selection sesthetic, 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, ii. 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 

 Synamoeba, ii. 125, 280 

 Systematic development, i. 313 

 System of animals, ii. 132 



apes, ii. 270 



Arabians, ii. 330 



arachnida, ii. 182 



Arians, ii. 331 



arthropoda, ii. 132 



articulata, ii. 177, 183 



catarrhini, ii, 270 



• ccelenterata, 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 



