376 



INDEX. 



Lungs, anlages of, 201 



early human, 144 



pig, 9 mm., 221 



pig, 17 mm., 234 



pig, 20 mm., 244, 246, 250 



pig, 24 mm., 267 

 Lutein, 47 

 Lyons blue, 368 



M. 



Malleus, origin of, 259 

 Mallory's stain, 370 

 Marams, anlage of, 249 

 Mammals, 23 



early development, 44 

 Mammary anlage, 171, 249 



bodies, 207 

 Mandible, pig, 9 mm., 219 



pig. 20 mm., 254, 255, 256 

 Mandibular cavity, 83 



process, 161 

 chick, 292 

 Marsipobranchs, 23 

 Marsupials, 24 

 Mass and surface, 37 

 Maturation of the ovum, 47 

 mouse, 312 

 time of, 49 

 Maxillary process in pig, 161 



pig. 20 mm., 254, 256 

 Maxilloturbinal fold, 240, 255 

 Measuring embryos, 356 

 Meatus, external auditory, anlage of, 186 

 Meckel's cartilage, 259 

 Mediastinum, 246 



Medulla oblongata, pig, 12 mm., 207, 212 

 Medullary canal, 71 



structure of, 71 



groove, 70 



chick, 274, 303 

 closure of, chick, 296 

 human, 1 30 



plate, 69 



human, 129 



wall, layers of, 227, 242, 244 



three layers of, pig, 12 mm., 183 

 Membrana decidua, 11S 



serosa, 86 

 Membrane, vitelline, defined, 40 

 Menstruation, 316 

 Meroblastic ovum, 26 

 Mesenchyma, chick, 277 



defined, 34 



differentiation of, pig, 17 mm., 233 



general account, 83 



pig, 12 mm., 181 



stages of, 83 

 Mesentery, pig, 17 mm., 237 



vertebrate, 21 

 Mesoblast, (foot-note) 26 

 Mesoderm, chick, 286, 288, 290 



defined, 26 



delamination of, 64, 74 



Mesoderm, early history, 74 



expansion of, 65, 74, 75 



origin of, 63 

 rabbit, 309 



somatic, 76 



splanchnic, 76 



structure of, chick, 294 

 Mesogastrium, 204 

 Mesonephros. See IVolffian bodies. 

 Mesothelium, defined, 35 



of heart, chick, 301 



origin of, 76, 82 



pig, 9 mm., 224, 225 

 Metanephros, defined, 103 

 Methods, general, 356 

 Microtomes, 360 

 Mid-brain, origin, 73 



pig, 9 mm., 222 



pig, 24 mm., 266 

 Milk-gland. See Mamma. 

 Milk-line, 162 



Monkey, second stage of, 121 

 Monotremes, 23 

 Mounting paraffin sections, 365 

 Mouth, pig, 12 mm., 207 



vertebrate, 20 

 Mouth-cavity, pig, 20 mm. , 240 

 Miiller's fluid, 364 

 Muscle-plate, pig, 6 mm., 231 



pig, 9 mm., 223 

 Muscles, dorsal, pig, 12 mm., 199 



hyoglossal, 259 

 Myotome, origin of, 82 



pig, 9 mm., 217 



pig, 12 mm., 187 



N. 



Nasal pits, pig, 12 mm., 187, 193 

 septum, pig, 20 mm., 241, 255 ■ 



Naso-turbinal fold, 255 



Neck bend in pig, 160 



Necrobiosis, 31 



Nephrotome, chick, 287 

 origin of, 80 

 separation of, 81 



Nerve, facial, roots of, 215 

 fourth, origin, 205 

 maxillary, pig, 20 mm., 255 

 oculomotor, pig, 12 mm., 1S0 

 olfactory, pig, 20 mm., 255 

 optic, pig, 12 mm., 210 

 roots, lateral, 184 



pig, 6 mm., 230 

 structure, pig, 12 mm., 215 

 trochlear, pig, 12 mm., 180 



Nerves, cephalic, pig, 12 mm., 1S6, 210 

 cervical, first, 187 



second, 191 

 post-trematic, 1 90 

 spinal, morphology of, 1 96 

 pig, 17 mm., 234 



