INDEX 



S49 



Echinus, 210 



Ecology — defined, 4 (see also adapta- 

 tion); of protozoa, 162; porifera, 172; 

 coelenterata, 186; unsegmented 

 worms, 204; echtnoderms, 220; an- 

 nulata, 235; moUusks, 255; arthro- 

 pods, 290; fishes, 367, 371; amphibia, 

 380; reptiles, 392; birds, 423; mam- 

 mals, 460 



Economic zoology, 508 



Ectoderm, 38, 40 



Ectosarc, 153 



Edentata, 451, 452 



Education, 473 



Egg, 30 



Elasmobranchii, 373 



Electric organs, 371 



Elephant, 455 



Elytra, 305 



Embryology, 488 



Embryology, defined, 4 (see develop- 

 ment), history of, 523 



Emu, 412 



Enamel, 51 (see teeth), 443 



Endopodite, 268 



Endosarc, 153 



Endoskeleton, 73, 328, 404 (see also 

 skeleton). 



Endothelium, 53 



Ensis, 258 



Entoderm, 38, 40 



Entomostraca, 293 



Environment, 100, 103, 114, 505 



Epeira, 309 



Ephemerida, 299 



Epiblast (see ectoderm). 



Epicranium, 273 



Epidermis (see integument), 326 



Epinephelus, 374 



Epithelial tissue, 49-53 



Equilibrium sense, 82, 355 



Erethizon, 457 



Ethnography, 475 



Eugenics, 519 



Euglena, 154, 158 



Eutheria, 440 



Euthyneura, 261 



Eustachian tube, 355 



Evolution, — meaning, 482; evidences, 

 483; course of, 491; factors in, 492 



Excretion, 17, 67, 72 



Excretory systems — coelenterates, 183; 

 unsegmented worms, 194, 195 ; 

 echinoderms, 217; annulata, 232; 

 moUusks, 252; arthropods, 284; ver- 

 tebrates, 345 



Exopodite, 268 



Exoskeleton, 73, 325 (see also integ- 

 ument). 



Eyes, 83, 286, 3S6 ; median, 390 



Eye-spots, coelenterata, 184; annelida, 

 233 



Facial nerve, 353 



False amnion, 410 



Fasciola (Distomum), 196, 197 



Fat cells, 56 



Fats, II 



Faunas, type of, 137 



Feathers, 400, 403 



Femur, 333 



Ferments, 10 



Fertilization, 36, 42, 75 



Fibrillse (muscle), 60 



Fibrous connective tissue, 55, 56 



Fin, 361 



Finches, 421 



Fishes, 146, 316, 359 



Fish Commission, work of, 369 



Fission, 192, 195 



Flame-cell, 193, 195 



Flamingo, 416 



Flat-worms (see platyhelminthes, 193). 



Pleas, 301 



Flies, 301 



Foetal membranes (see amnion and 



allantois). 

 Fluctuations, 104, 495 

 Food value of animals, 508 

 Foraminifera, 162 

 Formative pole, 37 

 Fox, 455-458 

 Fringillidae, 431 

 Frog, 319, 382 

 Frontal section, 92 

 Fruit-borers, 305 

 Functions (basal), 66 

 Pur (see hair). 



Galea, 274 

 Gallinas, 422 



