646 



INDEX 



Posterior nares, 320 

 Prebranchial branches of nerves, 464 

 Precervical sinus, 143, 147 

 Preformation theory, XIII 

 Preformationists, XIII 

 Pregnancy, abdominal, 30, 38 



mammary gland, during, 443 



proof of, 124 



tubal, 30, 38 

 Premolar teeth, 327 

 Premuscle sheath, 305 



tissue, 296 

 Preoptic recess, 531 

 Prepuce, in the female, 424 



in the male, 424 

 Presphenoid bone, 191 



Preterminal area of G. Elliot Smith, 469, 541 

 Primary areas or fields of Flechsig, 558 



germ layers (see also Germ layers), 51 



oocyte, 21, 22, 24 



spermatocytes, 17, 19, 24 

 Primitive body cavity (ccelom), 71 



coordinating mechanism, 504 



entoderm, 133 



groove, 6 1, 86 



gut (see also Archenteron), 51, 72, 316, 370 



intestinal cord, in the chick, 62, 77 

 in Mammals, 66 

 in Reptiles, 63 



organs, 52 



pericardial cavity, 84, 227, 311, 371 



segments, 68, 139, 293, 300 



streak, in the chick, 61 



in Mammals, 65 

 Primordial cranium, 189 

 Proamnion, 80, 104 

 Processus neuroporicus, 454 



reticularis, 511, 516 



vaginalis peritonei, 420 



Production of duplicate (polysomatous) mon- 

 sters, 613 



of monsters in single embryos, 614 

 Progamous determination of sex, 412 

 Projection fields, 558 

 Proliferation islands, 123 

 Pronephric duct, 384, 385 

 Pronephros, the, 384 



pronephric duct of, 384 

 tubules of, 385 



significance of, 385 

 Pronucleus, female, 23, 33 



male, 23, 33 

 Prophase, 4 



Prosencephalon (fore-brain), 454, 457, 467 



diencephalon, 455, 467 



peripheral neurones of, 501 



telencephalon, 455, 467 

 Prosopopagus parasiticus, 600 

 Prostate gland, 402 

 Protentoderm, 54 



of Amphibians, 54, 56 



of Birds, 60 



of Mammals, 66 



of Reptiles, 59 

 Protoplasm, structure of, i 

 Protozoa, cell- division in, 4 



conjugation in, 38 

 Psalterium, see Fornix commissure 

 Pterygoid hamulus, 191 



process, 191, 194 

 Pubis, the, 203 

 Pulmonary artery, 235, 243 

 Pulp of teeth, 325, 326 

 Pulpy nuclei, 179 

 Pulvinar thalami, 533 

 Purkinje cells, 527, 529 

 Pygopagus, 596 



Pyramids (see also Tracts, pyramidal}, 472, 521, 

 523, 524 



Quadrigemina, anterior, see Anterior corpora 



quadrigemina 



posterior, see Posterior corpora quad- 

 rigemina 



Rabbit, formation of amnion of, 104 

 Rabl, concerning origin of vitreous, 575 



concerning sex cells, 404 

 Rachischisis, 313, 605, 607 



cystica, 605 

 Radius, 200 

 Ramus, 196 



communicans, gray, 492 



white, 487, 492 

 Raphe (of epichordal segmental brain), 515 



(of scrotum), 426 

 Rathke's pocket, 319 



pouch, 531 

 Receptors, 448, 451, 457, 460, 462 



visual, 501, 505 

 Recessus postopticus, 454, 531 



praeopticus, 454, 531 

 Recklinghausen, von, concerning deficient 



growth of blastoderm, 607 

 Rectum, the, 341, 400 



