196 



INDEX 



Chlorine, in protein, 7 



Chlorocruorine, 108 



Chlorophyll, 8, 22, 25, 28, 35, 36, 94 



absent in roots, 119 

 Chloroplast, 21, 29, 33 

 Chromosomes, 191 

 Chrysalides, shrinkage of, 65 

 Chyle, 91 

 Cicada, 46 

 Cilia, action of, 15, 17, 58, 116 



in frog, 16 



in mollusc, 16 



animals devoid of, 17 



in Paramoecium, 123 



of snail, 124 



rhythmic motion of, 134 

 Civilizations, ancient, disappearance 



of, 158 

 Clays, 43 

 Clepsina, 114 

 Clostridium, 37 

 Clover, Vitamin C in, 95 



on movement of, 120 

 Coccidium, 46 

 Coccus, 27 

 Cockroach, 61 

 Coelenterata, amoeboid cells in, 121 



habitat of, 178 



hermaphrodite, 185 

 Cold-blooded animals, temperature 



of, 110 

 Colonies of cells, 19, 164, 167 

 Communities, rhythmic activity of, 



154^9 

 Compositae, reproduction of, 187 

 Coney, Hyrax, food of, 77, 78 

 Conjugation, 165, 189 

 Convoluta, influenced by tide, 144 

 Convolvulus, 118 

 Copepoda, 61, 66, 67 

 Cork, cells of, 17 

 Corpuscles red, number of, 107, 108 



size of, 108 



non-nucleated, 108 



white, 109 

 Cow, food of, 80 

 Crayfish, food of, 61 

 Crinoids (sea-lilies), food of, 59 

 Crocodiles, food of, 69 



mode of swimming, 127 

 Crocus, mode of growth, 137 

 Crows, 145 



Crustacea, 26, 66, 169 



giUs of, 103 



habitat of, 179 



spermatozoa of, 184 



hermaphrodite, 185 



parthenogenesis of, 187 

 Cuttings, reproduction by, 164 

 Cuttle-fish, Loligo, size of, 26 



attacks whales, 76 



backward movement of, 125 



habitat of, 178 

 Cyanea arctica, 26 



Daddy-long-legs, Tipula, 47, 



62 

 Daisy, 187 

 Daphnia, 107 



rise of, in water, 143 

 Darwin, on earthworms, 47, 59 

 Deer, food of, 79 



corpuscles of, 108 

 Denitrifying bacteria, 39, 42 

 Desman, Myogale moschata, 83, 84 

 Diarrhoea, infantile, 154 

 Diatoms, 25-6, 35, 36 



need hght, 25, 148 



season for, 151, 153 

 Dictyota, influence of moon on, 147 

 Digestion, defined, 90-1 

 Dirt, in London air, 106 

 Divers, pearl. 111 

 Diving birds. 111 

 Dogfish, 67 



ova of, 176, 177, 183 

 Dolphins, 76 



in Cameroon River, 77 



habitat of, 179 

 Dragon-flies, 61 

 Drone larva, 62 

 Duck, flight of, 130 

 Duck-billed platypus, Ornithorhyn- 

 chus, 72, 74 



low temperature of, 109 

 Dugong, 76, 77 

 Dust, in water injures fish, 105 



JliARTHWORMS, work of, in raising 

 soil, 47, 59 

 respiratory organs in, 103, 114 

 plasma in, 107 

 movement of, 126 



