INDEX 



341 



Earthworm, in, 115, 164-190, 166*, 

 168*, 194, 219, 275, 276, 277; anatomy, 

 164-185, 168*; behavior, 186-189; 

 digestive system, 168*, 169-170; em- 

 bryology, 1 85*-! 86; excretory organs, 

 1 66*, 175-176; grafting, 190* ; nervous 

 system, 176-180, 177*; nutrition, 170- 

 171; regeneration, i89*-i9o; repro- 

 duction, 180-185, 181*; respiration, 



I75 '. 

 Ecdysis, 216. 



Echinodermata, 6, 7. 



Ecology, 2. 



Ectoderm, no, 114, 115; organs arising 

 from, in: Ascaris, 162; Earthworm, 

 186; Honeybee, 252; Hydra, 119-124; 

 Planaria, 154. 



Ectoplasm: Ameba, 38; Paramecium, 

 61, 81. 



Ectosarc: Ameba, 37*, 38; Euglena, 82; 

 Paramecium, 59, 60*. 



Effector, 179. 



Efferent gill channels, 203. 



Efferent nerve fibers, 178, 179*. 



Egestion, 46; Ameba, 49; Hydra, 127. 



Egg, 15, 96, 98, 99, 104, 106, 107, 113; 

 holoblastic, 108, 109*; meroblastic, 

 108*: Ascaris, 161 ; Crayfish, 211, 

 214, 215*; Earthworm, 185*; Grantia, 

 149; Honeybee, 250, 251, 252; Hy- 

 dra, 118*, 135-137, 136*; Planaria, 

 156. 



Egg-laying: Crayfish, 2 13*-2 14; Honey- 

 bee, 251. 



Egg sac, 181*. 



Eimer, 295. 



Ejaculatory duct, 161, 248, 249*. 



Elasticity, of Euglena, 83*, 85. 



Electrotropism, 53: Ameba, 56; Hydra, 

 131-132; Paramecium, 77-78. 



Elementary species, 296. 



Embryogeny, 108. 



Embryology, 2, 107-115, 291; historical, 

 271-272: Crayfish, 214-216, 215*, 

 217*; Earthworm, i8s*-i86; Grantia, 

 149; Honeybee, 251-252*; Hydra, 

 118*, 137; Planaria, 156-157*; 

 Sponges, 150*, 152-153. 



Encystment, 112: Ameba, 52; Euglena, 

 83*, 85-86. 



Endoplasm, 81 : Ameba, 38; Parame- 

 cium, 60. 



Endopodite, 194*, 195, 197, 198, 199. 



Endosarc: Ameba, 37*, 38; Euglena, 

 82, 83* ; Paramecium, 59, 60*. 



Energy, of metabolism, 13, 49. 



Entameba histolytica, 82. 



Enteron, 186. 



Entoderm, no, 114, 115; organs arising 

 from, in: Earthworm, 186; Honey- 

 bee, 252; Hydra, 118*, 119, 124-125; 

 Planaria, 154. 



Entodermal plates, 216, 217*. 



Entomesoderm, 252. 



Entomostraca, 225*, 226. 



Environment, 73, 282. 



Enzyme, 25, 127, 170. 



Epidermis, in, 167*, 168. 



Epigenesis, 272. 



Epimeron, 194*, 195. 



Epipharynx, 235*. 



Epipodite, 196*, 197, 205. 



Epithelial tissue, ioo*-ioi. 



Epitheliomuscular cells, 119, 123, 125. 



Epithelium, in. 



Equatorial plate, 30*, 31. 



Equilibration, 208, 221-222. 



Equus, 292293. 



Eudorina elegans, 96. 



Euglena, 62, 81, 82-88, 83*, 276, 284; 

 anatomy, 82-85, 83*; behavior, 87; 

 encystment, 83*, 85 ; locomotion, 85, 

 86*; nutrition, 85; reproduction, 83*, 

 87. ^ 



Euglenida, 81. 



Euglenidce, 81. 



Evening primrose, 295. 



Evolution, 291-297; arguments for, 

 291-294; of horse, 292-293; of sex, 

 92 ; theories, 293-297. 



Evolutionary zoology, 2; historical, 

 273-274. 



Excretion, 14, 159; Ameba, 50; Earth- 

 worm, 176; Grantia, 148; Parame- 

 cium, 64, 67. 



Excretory system, in: Ascaris, 161*; 

 Crayfish, 195*, 205; Earthworm, 

 166*, 175-176; Honeybee, 242; Pla- 

 naria, 155, 156*. 



Excurrent, canal, 151*; pore, 144, 

 151*. 



Exopodite, 194*, 195, 197, 198, 199- 



Exoskeleton: Crayfish, 194; Honeybee, 

 234- 



