INDEX 



271 



Placenta, 65 



formation of, 72 et seq. 



description of full-time, 77 

 Placental syncytium, question of origin of, 73 

 Placodes, cerebral nerve, relation of ganglia 



to, 128, 130, 133 

 Plasmodiblast, Van Beneden, 74 

 Plasmodium, placenta!, or syncytium, 73 

 Plasmosomes, 4 

 Platt, Julia, on theory of head-segmentation, 



249 



Pleural cavity, 166, 239, 242 

 Pleuro-peritoneal cavity, 241 

 Plexuses of sympathetic, development of, 135 

 Plica semilunaris, 144 



gubernatrix, 196, 197 

 Polar bodies, formation of, 11, 12 

 Pole, animal, of ovum, 9 



vegetative, of ovum, 9 

 Pons, formation of, 109 

 Porta vestibuli of His, 234 

 Portal vein, 235 

 Post-branchial body, 169 

 Pouches, inguinal, 200 



visceral, 158 

 Praehyoid glands, 168 

 Pregnancy, changes of uterus in, 67 



ovarian, plasmodial layer in, 73 

 Premuscular sheath, in limb-buds, 247 

 Prepuce, 203 

 Primates, embryological limits of, 27 



time of formation of mesoderm in, 34 



gastrula theory applied to, 45 



absence of terminal sinus in, 59 



earliest blood-vessels on under-aspect of 



yolk-sac in, 59 

 Primitive groove, 36 



streak, 32 



phylogeny of, 48 

 fate of, 47 



origin of mesoderm from, 35 

 representing gastrula-mouth, 47 

 as phase in development of embryonic I 

 axis, 48 



plate, in Reptilia, 45 



segments, formation of, 49 

 Pro-amnion, region in human embryo corre- 

 sponding to, 52 

 Process, fronto-nasal, 84, 156 



maxillary, 84, 156 



lateral nasal, 87, 151 



mesial nasal, 87, 151 



intermaxillary, 154 



turbinate, 155, 257 



styloid, 257 



odontoid, 252 



costal, 250 



neural, 250 



articular, 252 



costal, in cervical, lumbar, and sacral 



regions, 252 



Processus vaginalis, 199 

 Proctodceal depression, 202 

 Procestrum, 11 

 Pronephros, 177 



Prosencephalon or fore-brain, 106, 111 

 Prostatic vesicle, 194 

 Protochordal plate (Hubrecht), 35 



knot (Hubrecht), 35 



process, 37, 46 



Protoplasm, 1 



Protostoma represented by primitive streak, 48 



Protovertebrae. See Primitive Segments. 



Psalterium or lyra, 123 



Pseudo-chromosomes, in maturation, 10 



Pteropus edulis, entypy of germinal area in, 32 



Pulmonary arch, 217, 219 



Pulvinar, 114 



Pupillary membrane, 143 



Pur kin je, germinal vesicle of, 9 



Pyramid of cerebellum, 110 



of thyroid, 168 



tracts, 105 

 Pyramids, appearance of, 108 



straight tubules of, in kidney, 185 



QUADRATE BONE, homology with incus, 260 



RABBIT, maturation of ovum in, 11 



germinal area in, 32 



formation of mesoderm in, 32 



notochordal canal in, 39 



blastoporic aperture in, Keibel, 43 



development of lens in, 138 



Wolffian duct in, 178 



tubules of Wolffian body in, 181 



epithelium of genital ridge in, 188 

 Rabl, on origin of vessels, 61 



lens- vesicle, 138 



vitreous body, 142 



Wolffian duct in rabbit, 178 

 Ramon y Cajal, on posterior roots of spinal 



nerves, 130 



outgrowth theory of nerves, 99 

 Ramus communicans, 135 

 Ranvier, on origin of lymphatics, 236 

 Rat, entypy of germinal area in, 31 



phagocytic action of decidual cells in, 67 



persistence of stapedial artery in, 222 



primitive vertebrae in, 250 



hypochordal rod in, 252 



development of basis cranii in, 254 

 Rathke, diverticulum of, or pocket of, 156 



on development of cloaca, 203 

 Rauber, layer of, 31 

 Ravn, on formation of septum transversum, 



238 



Rays, medullary, of kidney, 185 

 Rectum, 164, 185, 203 

 Rectus abdominis, 243, 246 

 Reichert, scar of, 69 



disposition of villi in ovum described by, 

 81 



cartilage of, 150 



on incus and stapes, 258 

 Reil, island of, 142 



Remak, on origin of sympathetic, 133 

 Reptilia, notochordal canal in, 41 



stages of gastrulation in, 45 



blastoporic aperture in, 46 



aortic bulb in, Greil, 210 



fold in heart analogous to septum 

 spurium, 212 



liver-parenchyma in, 174 



division of sclerotomes, v. Ebner, 250 

 Restiform bodies, 108 

 Respiratory passages, rudiment of, 158 

 Rete testis, 192 



tubules, 188, 191 

 * vasculosum lentis, 142 



