INDEX. 



375 



Head bend in pig, i6l 



process, 65 

 Heart, chick, 292 



anlage of, 301 

 aortic end, 278 

 endothelial, 278, 280, 282 

 in surface view, 273 

 muscular, 278, 280, 282 

 venous end, 280 

 ventricle, 282 

 early development, 301 

 endothelial, early human, 136, 138 

 origin of, 96 

 Heidenhain's iron hematoxylin, 368 

 Hematoxylin, iron, 368 



Weigert's, 369 

 Hemispheres, pig, 12 mm., anlages of, 186 



pig, 20 mm., 254, 257 

 Hensen's knot. See Primitive knot. 

 Hepatic cylinders, loo 

 Heredity, 40 

 Hermann's fluid, 365 

 Hind-brain, chick, 276, 277, 278, 280 

 origin, 73 

 pig, 9 mm., 227 

 Histological differentiation of chick, 293 

 Holoblastic ovum, 26 

 Human embryo, second stage, 123 

 fourth stage, 1 29 

 fifth stage, 131 

 sixth stage, 132 

 eighth stage, 135 

 ninth stage, 138 

 tenth stage, 142 

 eleventh stage, 142 

 twenty-six days, 143 

 twenty-seven days, 144 

 See also Embryo, human. 

 Humor, vitreous, pig, 24 mm., 263 

 Hyaloid canal of eye, 263 

 Hyoid branchial arch, 161 



cavity, 83 

 Hypoblast, (foot-note) 26 

 Hypophysis, development, 207 

 of pig, 24 mm., 265 

 of vertebrates, 21 



I. 



Ichthyopsida, 23 

 Ileum, pig, 9 mm., 226 

 Imbedding, 365 



Implantation, defined, 106, 118 

 Impregnation in Ascaris, 54 



in mouse, 53, 312 



in rabbit, 52 



site of, 50 

 Incubator, 269 

 Infundibular gland, pig, 12 mm., 183, 207 



pig, 24 mm. , 265 

 Inner layer of blastodermic vesicle, 60 



mass of blastodermic vesicle, 58, 6i 

 Insectivora, 25 

 Intermediate cell-mass, 80 



Intestine, chick, caudal, 289 



open, 285, 286, 287, 288 

 pig, 9 mm., 221 

 large, 226 

 structure, 226 

 pig, 17 mm., 237 

 pig, 20 mm. , 253 



large, 247 

 vertebrate, 21 

 Invaginations, 37 

 Iris, 262 



Isthmus of brain, pig, 12 mm., 205 

 pig, 24 mm., 265 



Jakobson's organ, pig, 20 mm., 255 



K. 



Kidney, foetal, defined, 102 

 origin of, 237 

 pig, 17 mm., 237 

 pig, 20mm., 251 

 true, 103 



Kollmann's embryo, 132 



Labyrinth of ear. See Otocyst. 

 Lachrymal groove, l6l 



pig, 12 mm., 190 

 Lamina postoptica, 207 



terminalis, 207 



pig, 24 mm., 265 

 Larval type of development, 32 

 Larynx, pig, 12 mm., 191, 208 

 Lateral recesi of hind-brain, 208 



roots of cephalic nerves, 212 

 Layership, defined. 36 

 Lens, anlage of, chick, 276 



pig, 12 mm., 187 



pig, 24 mm., 262 

 Leucocytes, 94 

 Limb-buds, 142, 162, 171 



pig, 9 mm., 226 



pig, 12 mm., 195 

 Limbs, anlage of muscles of, 195 



of vertebrates, 20 



posterior, pig, 20 mm. , 247 

 Liver, blood production in, 252 



chick, 283 



early human, 140 



general account, 100 



of vertebrates, 21 



pig, 12 mm., 204 



pig, 20 mm., 251 



pig, 24 mm., 267 



position of, 21 

 Lizards, 23 

 Lumbar plexus, 247 



