374 



The Study of Animal Life 



Mates, love of, 90, 91, 96 

 Mayflies, 106, 107 

 Metamorphosis of Insects, 243 

 Mesoderm or mesoblast, 196 

 Migration of birds, 74 

 Millepedes, 241 

 Mimicry, 57-61 

 Mites, desiccation of, 41, 42 

 Molluscs, 10, 243-247 

 Monkeys, 270, 271, 341 



gregarious life of, 71 

 Monogamous mammals, 96 

 Moss-insect, 55 

 Moulting, 315 

 Movement, 144 



Movements of animals, 123, 124 

 Mud-fish, 8 

 Mygale, 36 

 Myriapoda, 241 



Natural selection, 295 

 Nematoda, 231 

 Nemerteans, 230 

 Nervous system, 148 

 Nudibranchs, 56 

 Number of animals, 14, 15 

 Nutrition, 144 

 Nutritive relations, 27, 28 



Odours and sexual attraction, 



Offspring, care for, 103-116 



Ontogeny, 203 



Ooze, 220 



Organic continuity, 203, 326-329 



Organs, 175 



change of function of, 178 



classification of, 178 



correlation of, 176 



order of appearance of, 175, 

 176 



rudimentary, 178, 179 



substitution of, 178 

 Orioles, S9 

 Ovists, 191 

 Ovum, 191-193 



theory, 196 

 Oysters, mortality of, 43 



Pal^ontological series, 206 

 Palseontology, 204-209 

 Pangenesis, 324 

 Parasitic worms, 229-231 

 Parasitism, 47, 48 

 Parthenogenesis, 1S9-193 

 Partnerships among animals, 68, 



69 

 Perception, 151 

 Peripatus, 10, 240 

 PhasmidEe, 53 

 Phenacodus, 269, 270 

 Phyllopteryx, 54 

 Phylogeny, 203 

 Physiology, 125-152 

 Pigeon, 27s, 276 

 Pineal body, 260 

 Plants and animals, 19, 20, 28-31, 



168-171 

 Polar globules, 193 

 Polyzoa, 235 



Preformation theories, 191, 324 

 Pressures, effect of, 300 

 Protective resemblance, 53 

 Proteids, 134, 135 

 Protomyxa, 212 

 Protoplasm, 131-135 

 Protopterus, 41 

 Protozoa, 11, 210-221 



colonial, 173, 174 



classes of, 211 



hfe of, 214 



"immortality" 6f, 172 



psychical life of, 215-218 



structure of, 213 



andMetazoa, transition between, 

 88, 89, 171-174 

 Psychology, 149 

 Pupss of caterpillars, 50 

 Puss-moth, 63, 64 



Radiant energy, influence of, 



313-316 

 Recapitulation, 197, 279 

 Reflex actions, 155 

 Reproduction, 184-190 

 Reptiles, 9, 259-264 

 Respiration, 146 



