346 



INDEX 



Order, 3. 



Organ, in. 



Organic evolution, 228. 



Organism, characteristics, 10-16. 



Organization of bodies, 12-13. 



Organogeny, 108, in. 



Origin of flowers, 246. 



Orohippus, 292. 



Orthogenesis, 294-295. 



OsciUaria, 46, 48*. 



Osculum, 144, 145*, 149, 151*. 



Osmosis, 171. 



Ostia, 145, 151*, 152, 202, 242. 



Ovary: Ascaris, 161*; Crayfish, 211*; 

 Earthworm, 180, 181*, 184, 185; 

 Honeybee, 249*, 250 ; Hydra, 118*, 119, 

 135; Planaria, 154*, 156. 



Oviduct: Crayfish, 211*; Earthworm, 

 167, 180, 181*; Honeybee, 249*, 250; 

 Planaria, 154*, 156. 



Ovum, 106. 



Owen, Richard, 270. 



Oxidation, in metabolism, 13, 14. 



Oxygen, in living matter, 1 1 ; in metabo- 

 lism, 13, 14; in protoplasm, 21. 



Oyster, 283. 



Palcemon, 219*, 220. 



Paleontology, 2, 279-280, 292. 



Paleozoology, 2. 



Pandorinamorum, 94, 95*, 96, no, 113. 



Paramecidce, Si. 



Paramecium candatum, 15, 59-79, 81, 82, 

 87, 108, 127, 275, 277, 302; anatomy, 

 59-64, 60*; behavior, 73-79; hered- 

 ity, 79; life cycle, 71-73; locomotion, 

 64, 65*, 66; nutrition, 66-67; repro- 

 duction, 67*-7i, 69*. 



Paramylum, 83*, 84. 



Parasitic Protozoa, 80, 82. 



Parasitism, 298-300. 



Parazoa, 5. 



Pareiopod, 195*, 198. 



Parietal blood vessel, 172*, 173. 



Parthenogonidia, 97*. 



Pasteur, 9. 



Pea, hybrid, 289-290. 



Pellicle, 59, 60*, 61, 83*. 



PencRus, 230*, 231*, 232. 



Penial setae, 160. 



Penis, 154*, 156, 249*. 



Perception, 178. 



Pericardial sinus, 202, 242. 



Peripatus, 225, 226*, 227. 



Peripheral nervous system, 177-178. 



Peristaltic contraction, 175. 



Peristome, 59, 60*. 



Peritoneum, 168. 



Perivisceral sinus, 203. 



Pharynx, 81, in, 159: Ascaris, n 

 161*; Earthworm, 168*, 169, 170; 

 Planaria, 154*, 155. 



Photosynthesis, 18*, 28, 84. 



Phototropism, 53: Ameba, 56*; Cray- 

 fish, 223; Earthworm, 188; Euglcna, 

 86*, 87*; Hydra, 131. 



Phyla, of animals, 5-7*; characteristics 

 separating, 4. 



Phytogeny, 229. 



Physalia, 142, 143*. 



Physicochemical theory of life, 23-25. 



Physiological continuity between cells, 

 97*. 



Physiological isolation, 286. 



Physiological states, 78, 189. 



Physiology, 2; historical, 272-273. 



Pigeons, 293-294*. 



Pincher, 195*, 196, 198. 



Pithecanthropus, 3. 



Planaria lactea, 157. 



Planaria maculata, i53*-i57*, 165, 171 

 176, 277; anatomy, 153-156, 154*; 

 regeneration, 157*. 



Planaria polychroa, 153*. 



Plants, compared with animals, 17-18. 



Plasmodiumfalciparum, 89. 



Plasmodium malaria, 89. 



Plasmodium vivax, 82, 88*-92, 277; 

 discovery of, 88 ; life history, 89*-gi 

 reproduction, 90-91 ; transmission 

 mosquitoes, 88, 89, 90, 91, 92. 



Plastid, 27*, 28. 



Platyhelminthes, 5, 7, 153. 



Pleopod, 195*, 198, 190 



Pleurobranchia, 204. 



Pleuron, 194*, 195. 



Pliny, 268. 



Pliohippus, 292. 



Podobranchia, 204. 



Podocoryne carnea, 143. 



Poison gland, Honeybee, 239*. 



Polar bodies, 68, 91, 105*, 106, 113, ii< 

 115, 136, 149. 



Pollen, basket, 236*, 237-238; bn 



