INDEX 



637 



Masculine false hermaphroditism, 434 

 Massa intermedia, 535 

 Mastoid process, 191 

 Maternal impressions, 612 

 Maturation, 17 



and mitosis, significance of, 25 



in Ascaris, 17 



of the ovum, 21 



of the sperm, 17 



references for further study of, 32 

 Maxilla bone, 194 

 Maxillary process, 140, 147, 318 

 McMurrich, concerning derivation of the 

 dermis, 438 



concerning umbilical cord, 129 

 Mechanical theory of monsters, 613 

 Meckel's cartilage, 189, 194, 196 



diverticulum, 113, 339 

 Medial fillet, see Fillet, medial 



geniculate bodies, see Geniculate bodies 



lemniscus, see Fillet, medial 



longitudinal fasciculus, 466, 504, 511, 516, 



5i7 



nasal process, 148 

 Mediastinum testis, 413 

 Medulla oblongata, 477, 512 



taenia of, 513 

 Medullary cords, 406, 407 



folds, in chick blastoderm, 63 



groove, 67 



layer of telencephalon, 542, 554 



sheath, see Myelin sheath 

 Megakaryocytes, 273 

 Megaloblasts, 272 

 Meibomian glands, 578 

 Meiolecithal ova, 12 

 Meissner, plexus of, 491 



tactile corpuscles of, 438 

 Membrana preformativa, 325 



tectoria, 588 



undulatoria, 15 



Membrane bones of the skull, 192 

 Mendel's law of segregation, 26 

 Meningocele, 605 

 Meningoencephalocele, 605 

 Menstruation, 29 



relation to fertilization, 29 



relation to ovulation, 29 

 Merocytes, 59 

 Merorachischisis, 606 

 Mesencephalon (mid-brain), 84, 454, 475 

 Mesenchyme, 165 

 Mesenterial small intestine, 338 



Mesenteries, 370, 377, 380 



anomalies of, 382 

 Mesentery of the jejunum, 380 

 Mesoappendix, 381 

 Mesocardium, dorsal, 227, 372 



ventral, 227, 372 

 Mesocolon, ascending, 381 

 descending, 381 

 sigmoid, 381 

 transverse, 380 



Mesoderm, derivatives from, 161 

 development of, 134 

 extraembryonic, 88 



origin of, 90 



formation in Amphibians, 72 

 in Amphioxus, 68 

 in Birds, 75 

 in the frog, 73 

 in Mammals, 81 

 in man, 86, 88, 91, 92 

 in Reptiles, 74 

 gastral, 73 

 intraembryonic, 88 



origin of, 91 



layers of, in von Spec's embryo, 88 

 parietal, 71, 134 

 peripheral, 83 

 origin of, 91 

 peristomal, 54, 73 

 splanchnic, 102, 342 

 visceral, 71, 83, 134 

 Mesodermic evagination, 73 



somites, 68, 139, 293, 300 

 Mesoduodenum, 380 

 Mesogastrium, dorsal, 335, 377 



ventral, 336, 377 

 Mesolecithal ova, 1 2 

 Mesonephric duct, 386 

 mesentery, 418 

 ridge, 385, 388 

 Mesonephroi, atrophy of, in the female, 415 



in the male, 416 

 Mesonephros, 386 



Bowman's capsule, 387 

 degeneration of, 390 

 diaphragmatic ligament of, 389, 418 

 disappearance of, 390 

 function of, 389 

 glomerulus of, 387 

 Malpighian corpuscle of, 387 

 renal portal system of, 390 

 significance of, 390 

 tubules of, 386 



