226 



INDEX 



Cocoon, 84. 



Codling moth, 84, 86, 87, 95. 



Coelenterata, 28. 



Coleoptera, 82. 



Collecting insects, 72. 



Colorado beetle, 90, 91. 



Coloration, warning, 84, 146; pro 



tective, 34, 37, 49. 

 Colours of flowers, 85. 

 Comparative study, 85, 108, 122, 



223 ; moth and butterfly, 85. 

 Copper head, 145. 

 Coral, 31. 

 Coralline, 31. 

 Coral snake, 145, 146. 

 Cricket, 71. 

 Cross-fertilization, 25. 

 Cuckoo, 179. 

 Cuttlefish, 107. 

 Cypraea, 104. 

 Cysts, 13. 



Darwin, 48, 148. 



Devil's horse, 71. 



De Vries, 148, 224. 



Digits, 222. 



Diptera, 82. 



Division of labour, 27, 29. 



Dog, 224. 



Dolphin, 209. 



Doodle bug, 91. 



Dorsal, 43. 



Dove, 179. 



Dragon fly, 93. 



Duckbill, 196. 



Ear, of bird, 151 ; of frog, 131 ; 



of fish, 112. 

 Earthworm, 42. 

 Echinoderms, 9, 34, 125. 

 Economic importance of birds, 



rodents, 206. 

 Ectoderm, 26, 87. 

 Ectoplasm, 11, 14. 

 Egg, of insect, 81. 

 Endolerm, 26, 27, 37. 

 Endoplasm, 11, 14. 

 Energy, in amoeba, 12 ; organic, 



2, 3; plant, 2, 3, 5. 

 Environment, 148. 

 Epidermis, of mussel, 98. 

 Excretion, 12. 

 Eye, of bird, 150; of frog, 30; of 



grasshopper, 67, 79; of fish, 111. 



Family, 8. 



Fangs, venomous, 145. 



Farmers' bulletins, 95. 



Feather, 155. 



Fertilization, cross, 85. 



Field study, 10, 22, 42, 71, 72, 97, 



127, 165, 166, 167, 184. 

 Fins, 110, 113. 

 Flagcllum, 21, 27. 

 Flatworm, 49. 

 Flea, 92, 93. 

 Flight, of bird, 157, 175; of moth, 



84. 

 Fly, horse, 81 ; house, 92, 93. 

 Food, of birds, 177. 

 Food tube, of bird, 163; of fish, 



116; of insect, 76; of mussel, 



102. 

 Foraminifera, 15, 18. 

 Frog, 128. 

 Function, 1. 



Ganglion, 45. 

 Gasteropod, 108. 

 Gastrula, 7. 

 Genus, 8. 

 Geographical barriers, 148. 



167; insects, 93; molluscs, 105 ;| Gila monster, 147. 



