INDEX 



435 



Development, of earthworm, 211 ; 



of frog, 280 ; 



of mosquito, 242. 

 Diastase, action on starch (Exp.), 73. 

 Diastole, 353. 

 Diatoms, 177. 

 Dichogamy, 46. 

 Dicotyledons, defined, 75; 



fibro vascular bundle of, 109 ; 



parts of stem of, 105, 108. 

 Diet, mixed dietary the best, 321, 



323. 

 Digestion, defined, 330; 



in corn cotyledon, 75; 



in stem, 112; 



of starch, 334; 



organs of, in man, 330; 



purpose of, 330. 

 Dimorphism in flowers, 46; 



sexual, 235, 236, 246. 

 Dioecious flowers, 45. 

 Dipsomania, 411. 

 Diptera, 240. 

 Disk flowers, 49. 

 Dislocations, 379. 

 Division of labor, in Pandorina, 187 ; 



in the hive, 250; 



in Volvox, 187. 

 Dragon fly, 243. 

 Drawing, 13. 

 Drink habit, 416. 

 Drupe, 53. 



Eagle, golden, 304. 

 Ear, care of, 422; 



in man, 421 ; 



inner, 421, 422; 



middle, 421 ; 



structure of, 421. 

 Earthworm, 208; 



bflateral symmetry in, 208; 



blood course of, 210; 



body cavity, 210; 



comparison between hydra and, 

 210; 



Darwin on, 210; 



development of, 211; 



digestive tract, 209, 210; 



feeding habits, 209. 



Earthworm, locomotion, 209; 



nephridia, 209, 210; 



reactions of, 209; 



regeneration in, 211; 



respiration in, 211. 

 Eating, hygienic habit.s of, :i42. 

 Economic iin|)ortanc(', of biig.s, 247; 



of flics, 242; 



of moUusks, 268; 



of toads, 283. 

 Economic value of fruits, 62; 



of leaves, 141 ; 



of lobsters, 222; 



of trees, 117. 

 Ectoderm, 193. 

 Ectoplasm. 182. 

 Egg, segmentation of, 192. 

 Egg cell, in ferns, 154; 



in flowers, 34 ; 



in moss, 158. 

 Elements, chemical, 15. 

 Elytra, 244. 

 Embryo, 67; 



arrangement of, 71. 

 Emulsion, eff"cct of pancreatic fluid 

 upon, 339; 



how produced, 339; 



mflk an, 339. 

 Endoderm, 193. 

 Endoplasm, 182. 

 Energy, sun a source of, 128. 

 Entomostraca, 225. 

 Enzyme, amolypsin, 339; 



diastase, 73; 



lipase, 339; 



pepsin, 336; 



ptyalin, 334; 



rennin, 337; 



trypsin, 339. 

 Epidermi.s, 129. 130; 



human skin, 'M)\. 395. 

 Epithelial cells. 189. 

 Equisetuni, 156. 

 Eustachian tube, in frog. 279. 

 Excretion, organs of, 391. 

 Excurrent trunk. 102. 

 Experiment. 12. 

 Eye, of insects, 230 ; 



blind spot, 426. 



