468 



INDEX 



Lenticular zone of optic cup, 271 



Lesser peritoneal cavity, 844 



Ligamentum pectinatuni iridis, 279 



Limiting sulci, 130 



Lingual glands, 306 



Lip-grooves, 304 



Liver, histogenesis of, 323; later de- 

 velopment of, 319-323; origin and 

 early development of, 179, 180, 

 181; origin of lobes of, 322; pri- 

 mary ventral ligament of, 335 



Lungs, 178, 326 



Macula utriculi, sacculi, etc., 295 



Malpighian corpuscles (mesonephric) 

 origin of, 195 



Mammillae of shell, 17 



Mandibular aortic arch, 121, 122, 

 203, 204 



Mandibular arch, skeleton of, 431 



Mandibular glands, 306 



Mantle layer of spinal cord, origin 

 of, 239 



Margin of overgrowth, 52, 57 



Marginal notch^ 60, 84, 85 



Marginal velum, 235 



Marrow of bone, origin of, 410 



Maturation of ovum, 32 



Meatus venosus, 199, 364, 366, 368 



Medullary cords of suprarenal cap- 

 sules, 405, 406 



Medullary neuroblasts of brain, 262 



Medullary plate, 95; position of an- 

 terior end of, in neural tube, 102, 

 103 



Megaspheres, 59 



Membrana reuniens, 418 



Membrane bones, definition of, 407 



Membranes of ovum, 10 



Membranous labyrinth, 289 



Meroblastic ova, 11 



Mesencephalon, 108, 155, 251 



Mesenchyme, definition of, 116 



Mesenteric artery, 363 



Mesenteric vein, 366, 367 



Mesenteries, 333 



Mesentery, dorsal, 172, 342; of the 

 vena cava inferior, 341 



Mesoblast, gastral, 110; of the head, 

 origin of, 116, 117; history of be- 

 tween 1 and 12 somites, 109; lat- 

 eral plate of, 110, 115; of opaque 

 area, origin of, 86, 88; origin of, 

 74, 78; paraxial, 110; prostomial, 

 110; somatic layer of, 115; splanch- 

 nic layer of, 115 



Mesobronchus, 326, 327 



Mesocardia lateralia, 200, 207, 334, 

 337 



Mesocardium, origin of, 120 



Mesogastrium, 309, 342, 343 

 Mesonephric arteries, 363 

 Mesonephric mesentery, 341 

 Mesonephric tubules, formation of, 



195 

 Mesonephric ureters, 380 

 Mesonephros, later history of, 378; 



origin and early history of, 194- 



197; see Wolffian body 

 Mesothalamus, 251 

 Mesothelium, definition of, 116 

 Metacarpus, 436, 437, 438 

 Metamorphosis, 11 

 Metanephros, 384-389 

 Metatarsals, 441 

 Metathalamus, 251 

 Metencephalon, 155, 251 

 Mid-brain (see Mesencephalon) 

 Mid-gut, 172, 181, 310 

 Mouth, 301 

 Mi'illerian ducts, 391 ; degeneration 



in male, 402, 403; origin of, 401, 



402, 403 

 Muscles of iris, 274 

 Muscle plate, 185, 186 

 Myelencephalon, 155, 252 

 Myocardium, origin of, 119 

 Myotome, 188 



Nares, 286 



Nephrogenous tissue, 195, 378; of 



metanephros, 384, 387 

 Nephrotome, 114, 190 

 Neural crest, 156 

 Neural folds, 97, 99 

 Neural groove, 97 

 Neural tube, 95, 105 

 Neurenteric canal, 73, 82 

 Neuroblasts, 233-239; classes of, in 



spinal cord, 244 

 Neurocranium, 427, 428 

 Neuroglia cells, origin of, 239, 240 

 Neuromeres, 108, 148, 152, 155 

 Neurone theory, 236, 255, 256 

 Neuropore, 101, 105 

 Notochord, later development of, 



411 ff; origin of, 80; in the region 



of the skull, 428 



Oblique septum, 331, 342 

 Oculo-motor nerve, 265; nucleus, 



262, 263 

 Odontoid process, origin of, 420 

 a:sophagus, 179, 310, 312 

 Olfactory lobe, 247 

 Olfactory nerve, 263 

 Olfactory pits, 169, 285 

 Olfactory vestibule, 285 

 Omentum, development of, 343 

 Omphalocephaly, 120 



