INDEX. 



403 



PRO 



Protozoa continued. 



noctiluca miliaris, 105 

 polycystina, 105 



infusoria, 106 



importance of protozoa in the house- 



hold of nature, 111 



sponges, 112 

 Pteropoda, 159 



conical appendage of the Clio's head, 



160 



its dental apparatus, 161 

 Pteropus, skeleton of, 321 

 Ptygura melicerta, 172 

 Puffin, the burrowing, 302 

 Pyrosomata, structure of, 148 

 Pysalus, or Portuguese man-of-war, 130 

 Pythons, their colossal strength, 277 



their mode of taking their prey, 277 



Q 



UININE, 70 



EAFT SPIDERS, 241 

 Rain, origin of, 27, 30 



difference in the quantity of, at vari- 



ous heights, 32 

 Raptorial birds, 292 

 Rattans, root of the, 58 



stems of the, 66 

 , Razor shells, 153 



Reptiles, 268 

 I their defences, 268 



chelonians, 268 



lizards, 270 



frogs, 270 



toads, 271 



snakes, 271 



intellectual powers of reptiles, 280 

 maternal affection of some kinds, 

 280, 281 



memory of lizards, 281 



hybernation of reptiles, 281 



their uses to man, 282 



their enemies, 283 



their fecundity, 285 



Reticularia maxima, immense number 



of its seed spores, 51, 85 

 Rhinoceros, armour of the, 361 



its protector bird, 371 

 Rhinolophus, organs of smell of, 354 

 Rhizopods, 101 



Rhizostomata, structure of the, 126 

 Rivers, the constant sources of, 27-29 



voices of the, 30 

 Rodentia, dentition of, 342 



provisions for their safety, 361 



their burrows, 362 

 Roots of plants, 54 



of the Algae, 54, 55 



of the creepers of South Africa, 56 



SEE 



Roots continued. 



of forest trees, 56, 57 



of the climbers, 58 



of the mangrove, screw-pine, and 



banyan, 59, 60 



radical filaments and spongioles, 6 1 

 Rotifera, 172 



their complex organization and 



habits, 172, 173 



their tenacity of life, 174 

 Ruminantia, dentition of, 343 



power and anger of the bovine races, 



358 

 Rynchophorous insects, 219 



SABELLA UNISPIRATA, 168 

 alveolaria, 1 68 

 Salmon, their migratory instincts, 248 



their longevity, 249 

 Salpse, 147 

 Sand-hoppers, 177 

 Sand-martin, nest of the, 302 

 Sand-reed, the, 56 

 Sand-star fishes, 133 



Sand- wasp, instincts of the, 222 

 Saw-fish, maxillary teeth of the, 252 

 Scari, teeth of the, 253 

 Screw-pine, roots of the, 60 



their services to more luxuriant vege- 



tation, 60 

 Scyllsea, 157 

 Sea-anemones, 116 



their animal nature, 116 



their internal structure, 117 



tentacles, 117 



urticating organs, 118 



their vitality, 119 



their modes of locomotion, 119 

 Sea-cucumbers, 139 



Sea-lark, nest of the, 311 



its artifices to deceive its enemies, 



313 



Sea-mat, leaf-like, 142 

 Seasons, their influence on organic life, 



47 

 Sea-stars, primeval, 132 



living, 133 



Sea-urchins, 137 



Seal, skeleton of the, 319, 357 



teeth of the, 341, 342 



its protective instinct, 370 

 Seeds, and their migrations, 84 



their defences, 84 



their dissemination over the earth, 



85 



their feathers and wings, 84 



seeds dispersed by jerking, 86 



influence of water-courses, 86 



seeds of littoral plants, 87 



mangrove seeds, 88 



