626 INDEX. 



Digestive system: Amphioxus, 69-71; Frog, 105-109, 145-157; Chick, 281- 



296 ; Rabbit, 399-412 ; Man, 544-565 

 Discoidal segmentation : 22 

 Discus proligerus : Rabbit, 349 ; Man, 454 

 Distortion of ancestral characters : 30 

 Dorsal fissure of spinal cord : Chick, 250 ; Man, 527 

 Dorsal roots of spinal nerves: Amphioxus, 43; Frog, 127-128; Chick, 271- 



273 ; Rabbit, 385-386 ; Man, 525-528 

 Down feathers : Chick, 335 

 Duct of Gaertner: Man, 596 



Ductus arteriosus: Chick, 307, 314; Rabbit, 417, 419; Man, 576, 585, 586 

 Ductus Botalli : Chick, 307 ; Rabbit, 417, 419 

 Ductus endolympbaticus : Frog, 142 



Ductus venosus : Chick, 310, 314 ; Rabbit, 419; Man, 581, 585, 586, 587 

 Duodenal loop of intestine : Chick, 290 ; Rabbit, 403 ; Man, 547 

 Dura mater : Rabbit, 381 

 Duration of development : Amphioxus, 48 ; Frog, 91-94 ; Chick, 221 ; Rabbit, 



350 ; Man, 449, 465-467 

 Duration of pregnancy : Man, 465-467 



Ear : Frog, 139-144 ; Chick, 280-281 ; Rabbit, 393-399 ; Man, 541-544 

 Early stages of development : Amphioxus, 48-61 : Frog, 100-112 ; Chick, 232- 



247 ; Rabbit, 351-362 ; Man, 470-486 

 Ectoplacenta : Rabbit, 438 

 Ectoplacental lobule : Rabbit, 441 

 Egg: structure, 3-7; maturation, 7-11; fertilisation, 11-13; unicellular 



character, 32 

 Egg: Amphioxus, 43-44, 49; Frog, 94-100; Ben, 220-222, 228-232; Rabbit, 



344-351 ; Man, 448-455 

 Egg column : Man, 450-451 

 Egg shell : Hen, 220, 229 

 Eighth month : Man, 508 



Embryo, formation of : Clack, 222-228 ; Rabbit, 362-367 ; Man, 472-486 

 Embryonal area : Rabbit, 357-361 ; Man, 473 

 Embryonic period : AmpMoxus, 48-73 

 Enamel: Frog, 211 ; Rabbit, 406 ; Man, 560 

 Enamel organ : Rabbit, 406 ; Man, 559-561 

 Endostyle : Amphioxus, 40, 79 

 Enterocoelic cavity : Amphioxus, 60, 243 

 Epiblast : 22, 23-24 ; Amphioxus, 53, 56 ; Frog, 104-105 ; Chick, 234, 236 ; 



Rabbit, 358, 361 ; Man, 475, 486 

 Epiblastic buds of yolk-sac : Rabbit, 369 

 Epibranchial groove : Amphioxus, 40 

 Epicoracoid: Frog, 213 

 Epidermic layer of epiblast : Frog, 105, 113 

 Epididymis : Chick, 320 ; Rabbit, 426 ; Man, 593 

 Epigenesis : 220 

 Epiglottis : Man, 556 

 Epiphysial ossification : Man, 509 

 Epipleural cavity: Amphioxus, 41 

 Epoophoron : Man, 595 

 Equal segmentation : 19,22 



Estimation of age of embryo : Chick, 223 ; Rabbit, 352 ; Man, 467-470 

 Ethmoidal plate : Chick, 329, 381 ; Rabbit, 432 

 Ethmoidal sinus : Man, 538 



Eustachian tube : Frog, 143 ; Chick, 285 ; Rabbit, 397 ; Man, 544 

 Eustachian valve : Chick, 303 ; Rabbit, 418 ; Man, 569, 583, 584, 585 

 Excretory organ : Frog, 185-197 ; Chick, 315-320 ; Rabbit, 421-426 ; Man, 588- 



591 

 External auditory meatus : Chick, 285 ; Rabbit, 398, 402 ; Man, 499-500, 544 

 External ear: Rabbit,398 ; Man, 499-500, 502, 544 



