Index 



333 



Double monsters, formation 



of, 329 



Double or bifid uterus, 326 

 Ductus arteriosus: (see Duc- 



tus Botalli) 

 Ductus Botalli: Chick, 246, 



260 

 Ductus Cuvieri : (see Cuvier- 



ian vein) 

 Ductus venosus: Chick, 199 



closure of: Chick, 261 

 Duodenum: Chick, 206 



Ear: Frog, 43; Chick, 184-187 

 Ectoderm or ectoblast: Frog, 

 24; Chick, 104; (in mam- 

 mals), 291 



organs from: Frog, 31; 



Chick, 276-277 

 Egg: (see Ovum) Frog, 6-10, 

 88; Chick, 90-93; Star- 

 fish, 5-6 



passage through oviduct: 



Chick, 94-95 

 Eighth day, development of: 



Chick, 281 



Eleventh day to hatching, 

 development of: Chick, 

 281-283 



Embryo, change in position 

 of: Chick, 165-167, 283 



calculation of age of, 322; 

 definition of, 322 



cloth model of: Chick, 114 

 119 



curvature of body of: Chick, 

 167 



estimation of age of: 

 Chick, 134-135 



folding off of (mammal), 

 296 



(human), formula for cal- 

 culation of age of, 324 



method of measuring, 323 



movements of: Chick, 283 



rocking motion of: Chick, 



169 



Embryo-sac: Chick, 116, 165 

 Embryonic shield: Chick, 



122; (mammal), 293294 

 Entoderm or entoblast : Frog, 



26; Chick, 12 1 ; Mam- 

 mals, 291 

 organs from: Frog, 31; 



Chick, 277 



Epididymis: Chick, 236 

 Equal segmentation, 97 

 Ethmoidal plate: Chick, 267 

 Eustachian tube: Frog, 53; 



Chick, 193 



Eustachian valve: Chick, 259 

 Exoccipital: Frog, 77 

 External auditory meatus : 



Chick, 193 

 External genitalia of man, 



development of, 316320 

 External nares: Frog, 45; 



Chick, 187 

 Eye: Frog, 4 1-43; Chick, 175- 



184 

 Eyelids: Chick, 183 



Fallopian tube : (see Oviduct) 

 False amnion: Chick, 168 

 Fat bodies: Frog, 88 

 Feathers: Chick, 281-282 

 Female pronucleus: Frog, n 

 Fertilization of the egg: Frog, 

 1617; Chick, 95; Mam- 

 mal, 289 

 Fifth day, development of: 



Chick, 263-278 

 First day, development of: 



Chick, 120-139 

 Fcetal, membranes, abnor- 

 malities of, 325 

 placenta, 299,307,309, 312 

 Foetus, abnormalities of, 326- 



3 2 9 

 definition of, 322 



