INDEX. 



Palatine arch, development of, ... 416 



Pancreas, development of, 409 



Papillae of the tongue, 249 



Parovarium, 278, 422 



Parturition, causes of, 452 



premature, induced by arti- 

 ficial means, 452 



reflex action in, 453 



arrest of haemorrhage after, 



386, 453 



after death, . ., 461 



Penis, development of, 427 



Pharynx, development of, 407 



Pia mater, first appearance of, ... 398 



Pia mater testis, 316 



Pitch (see sound), 173 



Pituitary membrane, 25 



Placenta, development of,.. .. 361, 377 



time of limitation of, 370 



maternal portion of, 378 



injection of, while attached 



to the uterus, 379, 381 



relations of the foetal to the 



maternal portions of, 379, 382 



curling arteries of, 380, 385 



structure of, 383 



dissepiments of, 383 



utricular glands of, 384 



blood-vessels of, 384 



foatal villi of, 385 



separation of, in parturition, 386 



in cases of twins, 451 



Placental circulation, development 



of, 432 



Pleuro-peritoneal cavity, first ap- 

 pearance of, 391 



Plicae palmatae, 283 



Plica semilunaris, 141 



Polar globule, 355 



Pons Varolii, development of,.. . . 400 



Portal vein, development of, 434 



Pregnancy, influence of, upon sub- 

 sequent fecundations, 346 



duration of, 446-448 



multiple, 451 



Fallopian and abdominal,. . . 452 



Primitive trace of the embryon, 



358, 359 



Prisms, refraction by, 75 



Prostate, ! 321 



Prostatic fluid, 321, 324 



Puberty, 300, 459 



Puberty and menstruation, 300 



Pulmonary artery, first appearance 

 of, 432,433 



Pulmonary circulation, first estab- 

 lishment of, at birth, 441 



Puncta lachrymalia, 143 



Punetuiu caecum, 87, 90 



Pupil, 51, 402 



Pupillary membrane, 54, 402 



Purkinje, vesicle of, 291 



Putrefaction after death, 463 



Quadrilateral canal of the cochlea, 220 



Recti muscles of the eyeball, action 



of, 133 



Refraction by lenses, 77 



Refraction, mechanism of, in the 



eye, 89 



by the cornea and crystal- 

 line lens, 91 



Reissner, membrane of, 215 



Resonators of Helmholtz, 184 



Respiration, cause of first effort 



of, at birth, 442 



Respiratory efforts before birth, 



404, 441 

 Respiratory system, development 



of, 410 



Resultant tones, 187 



Rete testis, 316 



Retina, 54 



extent and thickness of,. ... 55 



ora serrata, 55 



yellow spot of (macula lutea), 55 



layers of, 55 



rods and cones of (bacillar 



membrane, or Jacob's mem- 

 brane), 55, 56 



external granule-layer of,... 58 



inter-granule layer of (cone- 

 fibre plexus), 58 



internal granule-layer of, .... 58 



granular layer of, 58 



layer of ganglion-cells, 58 



expansion of the optic nerve, 59 



blood-vessels of, 60 



comparative sensibility to 



light of different portions of,. . . 88 

 Right-handedness (see dextral pre- 

 eminence), 456 



Rima glottidis, development of,.. . 410 

 Rosenmiiller, organ of, 278, 422 



Saccule of the labyrinth, 214 



Savors, 232 



Scalae of the cochlea, 215 



Scarpa, humor of, 218 



