334 



Index 



Foramen ovale of heart: 



Chick, 256-261 

 Fore-brain: Frog, 37; Chick, 



141 



Fore-gut: Chick, 131, 203 

 Formula for calculation of 



age of human embryos, 



3 2 4 

 Fourth day, development of: 



Chick, 222-262 

 Fourth ventricle: Frog, 37 

 Frontal bone: Frog, 77 

 Fronto-nasal process: Chick, 



Gastrula, 100 



Gastrulae, kinds of, 100102 

 Gastrulation, relation to 

 amount of yolk, 98103 

 Genetic restriction , law of , 2 7 6 

 Genital organs: Frog, 87-89; 

 Chick, 237241; Man, 

 316-320 

 folds, 318 

 groove, 316, 318 

 ridge : Frog, 87 ; Chick, 237, 



239 



swellings, 318 

 tubercle, 316, 318 

 Germ layers, fate of: Frog, 



3031; Chick, 276277 

 formation of: Frog, 2130; 



Chick, 103-104, 121127 

 Germinal disc: Chick, 94 

 Germinal vesicle: Frog, 7; 



Chick, 94; Starfish, 6 

 Giants, 327 

 Gill clefts and folds, develop- 



ment and fate of: Frog, 



51-56; Chick, 192-198 

 Gill pouch: (see Gill clefts and 



folds) 

 Gills, external and internal: 



Frog, 53-56 

 Gizzard: Chick, 207 

 Glomerulus: Frog, 82 



Glottis: Chick, 209 

 Gonoblast: Frog, 88; Chick, 



239-240 

 Graafian follicle: Chick, 240 



Harelip: 196 

 Hatching: Chick, 283 

 Head: Chick, 224-226 

 Head-fold: Chick, 130-131, 



160 

 Head-kidney: Frog, 78-82; 



Chick, 233-234 

 fate of: Frog, 81-82 ; Chick, 



236 

 Heart: Frog, 56-69; Chick, 



143, 155, 198, 241-242, 



268-270 

 beginning of pulsations of: 



Chick, 145 



and blood-vessels, develop- 

 ment of: Frog, 56-69 

 endothelial lining of: Frog, 



58 



looping of: Chick, 144 

 musculature of; Frog, 60 

 Hermaphroditism, false, 327; 



true, 327 

 Hernia, 326 

 Hind-brain: Frog, 37; Chick, 



141 



Hind-gut: Chick, 203 

 Histological differentiation, 



273-277 

 types of, 275 

 Holoblastic segmentation: 



(see Segmentation, com- 

 plete) 



Hyoid apparatus: Chick, 194 

 Hyoid arch: Frog, 51: Chick. 



191 

 Hyomandibular cleft: Frog, 



51 ; Chick, 191 

 Hypospadias, 327 



Implantation of ovum, 293, 

 301 



