INDEX. 



Vermis, 533 



Vernix caseosa, 444, 449 



Vertebras, the, 183 



alternation of vertebrae and myoto- 

 mes, 184 



anomalies of, 213 



blastemal stage of, 184 



bodies of, 184 



cartilaginous stage of, 184 



costal process, 184 



intervertebral fibrocartilage, 184 



ligaments of, 188 



ossification stage, 186 



practical suggestions for further study 

 of, 218 



sclerotomes of, 182 

 Vertebras cervical, defects of, 616 

 Vertebral arch, 184 



articular process of, 186 



spinous process of, 186 



transverse process of, 186 

 Vertebrate, the definition of, 457 



differentiation of the anterior end of, 



457 



nervous system, see Nervous system, 



vertebrate. 

 Vesical fissure, 436 

 Vesicle, auditory, 592 



blastodermic, 138 



optic, 144, 574 

 Vesicles, brain, 461, 480 



seminal, 420 

 Vestibular ganglion cells, 599 



membrane (of Reissner), 597 



nerve, 599 



part of acoustic (auditory) nerve, 469 

 descending root of, 469 



pouch, 593 

 Vestibule, 467 

 Vestibulum vaginas, 428 

 Vicq d'Azyr's bundle, 544 

 Vignal, concerning the myelin sheath, 



5 01 . 

 Villi, chorionic, 114, 122 



fastening, 127 



floating, 127 

 Visceral mesoderm, 75, 87 



musculature, see Musculature visceral 



neurones, sympathetic, 458 



or splanchnic structures, 465 

 Visual area of pallium, 477, 564, 565 



cortex, 564 

 Vitelline arteries, 105, 239 



circulation, 239, 242 



duct, 117 



membrane, 1 1 



veins, 106, 238 

 Vitellus, 1 1 

 Vitreous, 585 



humor, 585 

 Vocal cords, superior, or false, 363 



true, 363 



Volar arch, superficial, 252 

 Voluntary muscle, striated, histogenesis 

 of, 37 



origin of, 293, 294 

 Vomer, 196, 198 



43 



Von Baer, XIII 



concerning cell differentiation, 55 



Von Baer's law, 387 



Von Loewenhoek, concerning the dis- 

 covery of the spermatozoon, 

 XIII 



Von Spec's embryo, 90, 140 



" Waters, " the, 117 



Wax reconstruction, 638 



Webs between digits, 155 



Weigert's haematoxylin, 635 



method for staining myelin sheaths, 

 57o 



Weisman and Brooks, concerning fertili- 

 zation, 40 



Wharton's jelly, 133 



Wheeler, diagram showing amitosis, 4 



White columns (see also Dorsal fumculus), 



5 ro 

 matter of cerebral hemispheres, 561 



of cord and segmental brain, 511 

 ramus communicans, 494, 499 

 Wiedersheim, concerning the mammary 



gland, 450 

 Wilson, E. B., concerning determination 



of sex, 416, 439 

 concerning duplicity with double 



gastrulation, 612 

 concerning the fertilization of eggs of 



sea-urchin, 37 

 Wilson, J. F., concerning intermediate 



region in the cord, 53 1 

 concerning intermediate plate, 53 1 

 Winslow, foramen of, 380 

 Wirsung, duct of, 352 

 Wlassak, concerning the myelin sheath, 



5 01 

 Wolffian duct, 389 



ridge, 391 

 "Wolf's snout," 216 



theory of epigenesis, XIII 

 Woods, concerning sex cells, 407 

 Wright, concerning blood plates, 276 



Xiphopagus, 609 

 Xiphoid process, 190 



malformations of, 609 



Yolk, comparison of amount of in forms 



of gastrulation, 61, 68 

 entoderm, in Amphibians, 58 

 in Birds, 64 



in Mammals, 70, 72, 85 

 granules, 1 2 



lack of, in Mammals, 108 

 plug, 58 

 sac, 103, 139 



formation of in chick, 103 

 function of, 104 

 in Mammals, 108, 110 

 in man, 91, 117 



its relation to blood vessels, 242 

 roof of, in chick, 84, 85 

 in Mammals, 89 

 in man, 91 

 stalk, 104, in, 141, 318 



