INDEX 



Adaptation, 79 



Aixmiota, 60 



Amoeba, 15 



Annelida, 41 



Arachnida, 46, 49 



Arthropoda, 44 



Ascidians, 58 



Biochemistry, 20 



Biogenesis, 75 



Biology, 5, 6 



Birds, 58, 60 



Bone, 32 



Brachiopoda, 53 



Cell, the, 18 



Cells, various kinds of, 22 



Cephalopoda, 51, 52 



Chromatin, 17 



Classification of animals, 33-62 



Cnidoblasts, 36 



Ccelenterata, 34, 35 



Coral, 36 



Crustacea, 45, 47 



Cytoplasm, 18 



Darwinism, 64 et sea. 



Developmental mechanics, 76 



Digestion, 18 



Ecdysis, 39, 44 



Echinodermata, 54 



Elementary species, 72 



Embryo, the, 31 



Embryology, comparative and experi- 

 mental, 73, 76 



Excretion, 20 



Fibres, muscular, 14 



Fibrils, 25 



Fishes, 58 



Flat worms, 36 



Frog, life-history of, 73, 74 



Gametes, 30 



Gastropoda, 51 



Growth, 6, 7 



Guinea worm, 40 



Hennaphroditefl, 31 



Hybrids, 62 



Insects, 46, 48 



Life, defined, 6 

 origin of, 63 



Liver fluke, 38 



Mammals, 58, 60, 61 



Man's place in the unirerse, 81 et 

 seq. 



Mendelisra, 69 et seq. 



Metabolism, 19 

 Metamorphosis, 78 

 Metazoa, 18 

 Mollusca, 49 

 Movement, 14 et seq. 

 Muscle fibres, 14, 25 

 Muscular fibrils, 25 



tissue, 32 

 Mutations, 72 

 Natural selection, 66 

 Nematocysts, 36 

 Nemertinea, 38 

 Nerve cells, 27 



tissue, 32 

 Nucleus, 17, 18 



Origin of species, 62 et seq. 



Pelecypoda, 51 



Phyla of animals, 33 



Plants, defined, 7 



Platyhelminthes, 36 



Polyps, 34 



Polyzoa, 54 



Porifera, 34 



Primates, 82 



Proteids, as animal food, 8, 10, 21 



Protoplasm, 17 



Protozoa, 18 



Recapitulation theory, 75 et seq. 



Reproduction, 7 



Reproductive or germ cells, 7, 30, 79 



Reptiles, 58, 60, 61 



Respiration, 19 



Sea-squirts, 58 



Secretion, 17 



Sex, 31 



Shellfish, 49 



Spermatozoa, 30, 31 



Sponges, 34 



Stinging cells, 36 



Tape-worms, 38 



Thread-worms, 39 



Tissue, kinds of, 31-33 



Trichinosis, 41 



Variation, 68 



Vertebrates, 57 



Worms. Se* Flat- worms, Nemertiuea, 



Thread-worms, Annelida 

 Zoology, bearing on human origin and 



future of race, 81 



practical importance of, 8 



scope of, 6 

 Zygote, a, 31 



I/I3 



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 Edinburgh 6* London 



