624 



INDEX 



endoskeleton, 435, 472 ; en- 

 teric canal, 444, 473 ; gills, 

 448, 478 ; blood-system, 449, 

 474, 477 ', nervous system, 

 458, 478 ; kidneys, 466, 476 ; 

 reproductive organs, 466, 475 ; 

 sense-organs, 464, 479 ; de- 

 velopment, 469, 582 



Dorsal, 6 



Drum-membrane, see Tympanic 

 membrane 



Ducts, see under names of indi- 

 vidual ducts and glands, 



Ductus arteriosus, 550 



Duodenum, 22 ; and see Enteric 

 canal 



Dura mater, 155 



Ear, see Auditory organ ; in- 

 ternal, middle, and external, 

 466, 492, 535, 595 



EARTHWORM : general characters, 

 326 ; metameric segmenta- 

 tion, 327 ; ccelome and en- 

 teric canal, 328, 333, 335, 355, 

 358; cell-layers, 329, 358; blood- 

 system, 337, 355, 357, 358; 

 nephridia, 340, 355, 357, 358 ; 

 nervous system, 342, 357, 358 ; 

 differentiation of organs and 

 tissues, 344 ; reproduction and 

 reproductive organs, 345, 355, 

 356 ; development, 349, 581 



Ecdysis, 369 



Echinodermata, 412 



Ectoderm, 202, 209, 298, 311, 

 314, 317, 349, 384, 470, 583, 

 586 



Ectoplasm, 231 



Efferent duct of spermary, 193, 

 347, 466, 603 



Egestion, 233 



Egg, 8 



Egg of fowl, 565 



Egg-cell, see Ovum 



Egg-sac, 346 



Elasmobranchii, 431 



Embryo, 9, 200 ; and see under 



various types 

 Embryology, 217 

 Embryonic area, 586 

 Embryonic membranes, 606 

 Emulsification of fats, 75 

 Enamel, 445, 510 

 Enamel-organ, 445 

 Encystation, 232, 244, 254, 275, 



283, 285 

 Endoderm, 202, 210, 298, 303, 



3", 314. 349, 3 8 4. 47. 5 8 3. 

 586 



Endoderm-lamella, 315, 317 



Endolymph, 188 



Endolymphatic duct, 436, 465 



Endoparasite, see Parasite 



Endoplasm, 231 



Endophragmal system, 363 



Endopodite, 364 



Endoskeleton : Frog, 16, 35, 

 205 ; Lancelet, 422 ; Dogfish, 

 435 ; Rabbit, 487 ; develop- 

 ment of, in Vertebrates, 604 



Endostyle, 424 



Energy, conversion of potential 

 into kinetic, 235 ; source of, in 

 chlorophyll-containing organ- 

 isms, 248 



Enteric canal : Frog, 22, 204 ; 

 Earthworm, 328, 335 ; Cray- 

 fish, 370 ; Mussel, 401 ; Lance- 

 let, 424 ; Dogfish, 444 ; Rabbit, 

 507-516 ; development of, in 

 Vertebrates, 204-210, 595 



Enteric epithelium, see Epithe- 

 lium 



Enteroccele, 580 



Enteron or enteric cavity, 296, 

 298, 311, 314, 330. 373, 580, 



595 



Epencephalon, 590 



Epiblast, see Ectoderm and p. 

 580 



Epiderm : Frog, 128 ; Earth- 

 worm, 328, 329 ; Crayfish, 369 ; 

 Mussel, 400 ; Lancelet, 419 ; 

 Dogfish, 433 ; Rabbit, 484 



Epididymis, 466, 538, 603 



Epiglottis, 512, 517 



