INDEX 



591 



Vena cava anterior (superior), 420 



posterior (inferior), 410, 419 

 Venous system, 407 

 Ventricle, lateral, 91 

 Vertebra, components of, 3S9 

 Vertebrae, ossification, 337 

 Vertebral centra, 293, 297 

 Vertical furrow, 6 

 Vipers, poison-fang, 326, 329 

 Visceral arches, skeleton, 318, 321 



clefts, 158 

 Vitelline artery, 237, 550 

 Vitreous body, 135, 140 

 Viviparity, 478 



Wolffian duct, 254 



Yolk, 2, 488 

 colour, 3 

 -plug, 33 

 -sac, 464 



retraction into body, 475 

 -stalk, 186 

 -syncytium, 16, 22 



Zygote, 1 



envelopes, 455 



END OF VOL. II 



Printed by R. & R. Clark, Limited, Edinburgh. 



