INDEX. 



397 



Groove, primitive, 48 

 Growth, law of unequal, 24 

 of embryo, 49 



Head-bend, 223 

 Head-process, 53 



Heart, chick, 186, 187, 188, 203, 205, 206 

 general account, 189 



origin, 96. 



pig, 12 . o mm., 282 

 Heidenhain's hematoxylin, 382 

 Hemispheres, cerebral, pig, 12.0 mm., 275 

 20. o mm., 325, 329 



origin, 74 



Hensen's knot, 48, 170 

 Heredity, theory of, 28 

 Hermaphrodites, 27 



pseudo-, 32 

 Hind-brain, chick, 180, 190, 191, 203 



differentiation, 74 



origin, 72 



pig, 9.0 mm., 258 



12. o mm., 263, 292, 296 

 Hind-gut, general account, 61 



origin, 57 



Hormone theory of sex, 2 7 

 Human embryo, 118 



age, calculation of, 118 



classification of stages, 119 



Coste, 138 



Dandy, 58, 137 



Eternod, 136 



Frassi, 119 



His, E, 136 



Lg, 141 



Sch, 141 



SR, 136 



2.15 mm., 141 



2 . 6 mm., 143 



3.2 mm., 145 



4 . o mm., 147 



4 . 2 mm., 144 

 Kollmann, 137 

 Mall, 147 

 Peters, 128 

 Spec, i. 54. mm., 135 

 stages, classification of, 119 



first, 119 



second, 119, 128 



third, 119 



fourth, 119, 134 



fifth, 120, 136 



sixth, 1 20, 137 



Human embryo, stages, seventh, 121, 140 



eighth, 121, 141 



ninth, 121, 143 



tenth, 121, 146 



eleventh, 121, 147 



four weeks to four months, 148-159 



relations to uterus, 124 

 Hyoid cavity, 87 

 Hypophysis, pig, 12.0 mm., 292 



24.0 mm., 335 

 vertebrates, 5 



Ichthyopsida, 7 

 Impregnation of the ovum, 38 

 Infundibular gland, pig, 12.0 mm., 268, 292 



24.0 mm., 335 



Inner man in segmentation, 44, 47 

 Insectivora, 8 

 Intermediate cell-mass, 85 

 Intervertebral discs, pig, 12.0 mm., 301 



20. o mm., 314 

 Intestine, caudal, 213 



open in chick, 191, 210, 212 



pig, 9.0 mm., 252, 255, 257 



17.0 mm., 308, 311 

 Iris, 331 



Iron hematoxylin, 382 

 Isthmus of brain, origin, 74 



pig, 12.0 mm., 292 

 Iter, defined, 74 



Jakobson's organ, 326 



Kidney, origin of renal anlage, 309 



pig, 17.0 mm., 308 



20. o mm., 322 



Knot, Hensen's, 48, 170 



primitive, 48 

 Kopffortsatz, 53 



Lachrymal groove, 222, 224 

 Lamina terminalis, 335 

 Larynx, anlage of, 276, 293 

 Lateral roots, 270, 297 

 Layer, subzonal, 44 

 Lens of eye, chick, 201 



origin, 78 



pig, 12.0 mm., 271 

 20. o mm., 329 

 24.0 mm., 333 

 Lesser peritoneal space, 290, 301 



