332 



LECTURES ON BIOLOGY 



Polyommatus, 192 



Polyspermy, 296 



Poplar, 193 ; hawk-moth, 202 



Porcupine-man, 321 



Potamanthus, 289 



Pouchet, 94 



Poulton, 136 



Power, 42 



Prehistoric animals, 109 



Preyer, 37, 89 



Prickly pear, 193 * 



Primary constituents, 228 



Privet hawk-moth, 136 



Processus vermiformis, 127 



Proglottis, 263 



Protective coloration, 159 ; resemblance, 



165 



Proteus, 163, 193 

 Prothallus, 200 

 Protohydra, 118 

 Protonema, 200 

 Protophyta, 244 

 Protopterus annectens, 107 

 Protozoa, 212 

 Protozoology, 221 

 Pseudopodia, 72 

 Pteranodon, 110 

 Pterodactylus, 25 

 Pteropus edulis, 25 

 Pteromys alborufus, 177 

 Pterosaurians, 110 

 Ptolemaic system, 86 



QUETELET'S law, 206 



RABBITS, 175 ; rabbit pest, 152 

 Eadiobes, 99 

 Ramsay, 99 



Ratio of reproduction, 151 

 Rawitz, 298 

 Ray, 178 

 Reaumur, 62 

 Recessive character, 317 

 Redia, 270 



' Red underwings,' 162, 165 

 Regeneration, 193, 83 

 Regnard, 35 

 Remack, 79 



Reproduction, 214 ; in freshwater 

 sponges, 258 ; by layers, 258 



Rhinoceros-bird, 280 

 Rhizocrinus, 128 

 Rhodites rosce, 267 

 Rhodocera rhamni, 192 

 Rhynchocephala, 108 

 Rock-dove, 143 

 Rosenberger, 136 

 Rose of Jericho, 40 

 Rossia macrosoma, 54 

 Roux, 52, 308 



Rudimentary organs, 12, 126 

 Riigen, 218 

 Rule of prevalence, 317 



SABLE, 160 



St. Hilaire, 8 



Salamander, 120 



Salpa, 162, 259 



Samter, 198 



Saurians, 26 



Sea-anemones, 181 ; sea-cucumbers, 253 ; 



sea-gull, 20 

 Seal, 24 

 Selaginella, 40 

 Selection, artificial, 142, 203; natural, 



141 ; natural selection a doctrine of 



chance, 173 ; sexual, 179, 288 

 Self-mutilation, 170 

 Semnia auritalis, 167 

 Serpulidse, 128 

 Serranus scriba, 286 

 Sertularidse, 262 

 Serum experiments, 136 

 Sex-nucleus, 223 ; sex-organs, 262 ; sexual 



glands, 284 

 ScarabfBus, 274 

 Scent-scales, 288 

 Schistosomum, 287 

 Schizopoda, 135 

 Schleiden, 68 

 Schmankewitsch, 198 

 Schopenhauer, 95 

 Schroder, 96 

 Schultze, Ferdinand, 95 



Max, 68 



Schwagerina, 218 

 Schwann, 68 

 Sciurus vulgaris, 177 

 Scolopendra, 290 

 Scyphostoma, 260 



