324 



INDEX 



Laryngotracheal groove, 



of chick, 72-hr., 215 



in human, 278 

 Larva, 



of frog, 139, 140 



of salamander, 109 

 Latent period, in growth, 245 

 Lateral mesoderm, 727. 128 



in chick, 200, 206, 207, 211, 221, 222 

 Lens, 167, 169 



induction of, 103 



in frog embryo, 134 

 Lens vesicles, 



in chick, 

 48-hr., 218 

 72-hr., 225 

 Ligature, 



on amphibian egg, 6 



on hydroid regeneration, 234 

 Limb, 



effect of, on differentiation of neuro- 

 blasts, 153, 154 



homologous function of, 156 



influence of, on nerve outgrowth, 147, 

 148 



nerve supply of, 147 



stimulus for regeneration of, 240, 241 



transplantation of, 147 , 148 

 Limb disk, 



development of, 98, 105 



labile organization of, 99 



origin of, 200 



polarity of, 98 



transplantation of, 98 

 Lithium, effect of, on sea urchin egg, 34, 35 

 Liver, 



in amphibian, 70 



of chick, 

 48-hr., 220 

 72-hr., 226 



formation of, 189, 190 



induction of, 189, 190 



in human, 278 



in pig, 212. 213, 271 



transplantation of, 190 

 Lung, 188 



Luteinizing hormone {see Interstitial-cell- 

 stimulating hormone) 



Mammalian development {see also De- 

 velopment, mammal and Human 

 development), 



Mammalian development — {Continued) 



compared with chick, 270 

 Mammary glands, of human fetus, 287 

 Mandibular arch, 188 

 Marginal periblast, 204, 205 

 Maternal chromosomes, 304 

 Maturation, of germ cells, 304, 305 

 Mechanical protection, in chick, 201 

 Medulla (of brain), 166 

 Meiosis, 305 

 Menstrual cycle, 259 

 Meridional cleavage, 115 

 Meroblastic cleavage, 115, 204 

 Mesencephalon, 165, 166, 213 



of chick, 



48-hr., 216, 218 

 72-hr., 223, 224 



of frog, 1 34 



of pig, 6-mm., 27/ 

 Mesenchyme, 



in formation of vertebrae, 163 



labile organization of, 193 



in sea urchin, 30 

 Mesenteries, origin of, 200 

 Mesonephric duct (Wolffian duct), in 



chick, 194, 196, 197 

 Mesonephric tubule, in chick, 196, 197 

 Mesonephric vesicles, in chick, 196, 197 

 Mesonephros, 196, 197 



of chick, 

 48-hr., 221 

 72-hr., 226 



in human, 279, 282, 283, 286 



in pig, 271,273 



renal portal circulation of, 180 

 Metamorphosis, of tadpole, 140 

 Metanephric tubule, in chick, 197 

 Metanephric vesicle, in chick, 197 

 Metanephros, 



in chick, 196, 197 



circulation to, 180,181 



in human, 282, 283, 286 

 Metencephalon, 165, 166 



in chick, 



48-hr., 276, 278 

 72-hr., 223, 224 



in pig, 277 

 Microdissection, 29 

 Midbrain {see Mesencephalon) 

 Middle ear, 188 



