IMiKX 



403 



Margo thalamicus, 327 

 Marrow, bone, 288 

 red, 288 

 yellow, 290 



cavity, 290 



Massa intermedia, 341 

 Mast leucocytes, 246 

 Mastication, muscles of, 319 

 Mastoid cells, 314 



process, 314 

 Maturation, 14 . 



of human ovum, 20 



of mouse ovum, 1 8 



significance of, 22 

 Maxilte, 315 

 ' Maxillary nerve, 1 1 8, 362 



process, 81, 82, 92, 114, 146, 315, 372 



sinus, 376 



Maxillo-turbinal anlage, 375 

 Meatus, external auditory, 92, 114, 148, 



391 



inferior nasal, 375 

 Meckel's cartilage, 315 



diverticulum, 81, 176 

 Meconium, 176 

 Median artery, 268 



longitudinal bundle, 335 



nerve, 356 

 Mediastinum, 169 



of ovary, 215 



testis, 214 



Medulla oblongata, 82, 330 

 Medullary cavity, 290 



layer, 337 



sheath, 305 



velum, 330, 337 

 Megakaryocytes, 247 

 Meibomian glands, 383 

 Melanism, 294 

 Membrana tectoria, 387 ' 

 Membrane, anal, 162, 206, 294 



basilar, 387 



bone, 287 



bones of skull, 314 



cloacal, 85, 161, 206 



decidual, 230, 232 



separation of, at birth, 241 

 tympanic, 120, 391 



limiting, of retina, 382 



obturator, 316 



pericardia!, 188 



peridental, 158 



pharyngeal, 161 



pleuro-pericardial, 183, 184, 185, 186 



pleuro-peritoneal, 183, 184, 185, 186 



pupillary, 381 



Reissner's, 387 



synovial, 290 



tympanic, 391 



urogenital, 162, 206 



vestibular, 387 



vitelline, 7 



Membranous labyrinth, 47 

 Mendel's law of heredity, 22 

 Meningoccele, 352 

 Meningoencephaloccele, 352 

 Meningornyelocoele, 352 

 Menstruation, 10, 230 



Menstruation, uterus during, 230 

 Mesamoeboids, 243, 244 

 Mesencephalon, 80 



chick, 46, 48, 62 



human, 326, 330, 337 



P"g. 94. "7 

 Mesenchyma, 3 



chick, 42, 53, 55 



human, 283 

 Mesenteric arteries, 124, 261, 262, 266 



inferior, 124, 262 



superior, 124, 261 



veins, 268 



superior, 102, 103, 127, 268 

 Mesentery, 95, 98, 122, 135, 1 80, 181 



anomalies of, 195 



dorsal, 83, 193 

 Mesocardium, 181 



dorsal, 49, 249 

 Mesocolon, 181, 194, 195 

 Mesoderm, 3, 28 



amphibian, 30 



Amphioxus, 30 



birds, 32 



extra-embryonic, 35, 73 



intra-embryonic, 35 



mammal, 34 



origin of, 30 



primary, 28 



reptiles, 30 



somatic, 54, 71, 170 



splanchnic, 54, 71, 170, 171, 366 



Tarsius, 35 

 Mesodermal segments, 2, 42, 53, 65, 



tissues, histogenesis of, 283 

 Mesoduodenum, 181, 194 

 Mesogastrium, 181 



Mesonephric duct, 51, 54, 65, 99, 1 22,^200, 

 2ii, 219 



fold, 198 



tubules, 198, 219 



and genital glands, transformation of , 2 19 

 Mesonephros, 54, 85, 92, 95, 99, 122, 145, 196, 



198 



Mesorchium, 211 

 Mesorectum, 181, 195 

 Mesothelium, 55, 283 



peritoneal, 172 

 Mesovarium, 211 

 Metameres, 2 

 Metamerism, 2 

 Metanephros, 64, 99, 122, 145, 196, 200 



and umbilical arteries, section through, 138 



calyces of, 200 



collecting tubules, 200, 202 



cortex, 203 



pelvis, 200 



tubules, 200, 202 



ureter, 200 



Metaphase of mitosis, 13 

 Metatarsus, ossification of, 316 

 Metathalamus, 329 



Metencephalon, 82, 94, 117. 3*7, 328. 33$ 

 Methods of study, 5 

 Mid-brain, 82, 327 



chick, 44, 46, 48 

 Mid-gut, 57, 161 

 Migration, cell, 3 



