Index 



291 



Unequal segmentation : 97 

 Ureter : Frog, 85 ; Chick, 235 

 Uro-genital organs, development 



of : Frog, 78-89 

 Urostyle : Frog, 73 



Vasa efferentia : Frog, 87 

 Vascular area : Chick, 147, 163- 



165 

 Vascular system : Chick, 145, 



156-159, 198-203, 242-261 

 Vas deferens : Chick, 236 

 Veins, afferent hepatic : Chick, 



251 



cardinal : Chick, 200 

 cardinal, fate of : Chick, 250 

 Cuvierian : Chick, 201 

 efferent hepatic : Chick, 251 

 hepatic : Chick, 255 

 hepatic-portal : Chick, 254 

 jugular : Chick, 250 

 mesenteric : Chick, 253 

 pectoral : Chick, 250 

 portal : (see Hepatic-portal) 

 pulmonary : Frog, 61 ; Chick, 



260-261 



vertebral : Chick, 250 

 vitelline : Chick, 144, 199 

 Vena cava, anterior (superior), 

 posterior (inferior) : Chick, 

 250-254 

 Venous system, development of : 



Chick, 249-261 



Ventricle : Frog, 61 ; Chick, 

 156 



Ventricular septum : Chick, 244 

 Vertebrae : Frog, 73 ; Chick, 



229 

 Vertebral column : Frog, 72-74; 



Chick, 226-233 

 Vertebral plate : Chick, 134 

 Vesicula seminalis : Frog, 85 

 Visceral arches, skeleton of : 



Chick, 268 

 clefts and folds : Frog, 51-53; 



Chick, 188-198 

 clefts and folds, fate of : 



Chick, 192-198 

 clefts and folds, meaning of : 



Chick, 192 

 skeleton : Frog, 77 

 Vitelline membrane : Frog, 5 ; 



Chick, 91 

 Vitreous humor : Chick, 181 



Wings : Chick, 244 



Wolffian body : Frog, 78, 82-83; 



Chick, 159, 216-220, 233 

 body, fate of : Chick, 236 

 duct : Frog, 83-85 ; Chick, 



I5i, 159 

 duct, fate of: Frog, 84; Chick, 



236 

 ridge : Chick, 223, 237 



Yolk : Chick, 90-92 



in relation to cleavage : 98-103 



plug : Frog, 23 



sac : Chick, 116, 165 



stalk : (see Somatic stalk) 



