37 



INDEX 



Valvula parodoxica, 278. 



Vas afferens, 203. 



Vas defer ens, 205. 



Vasa efferentia, 115, 204, 215. 



Veins, 265, 272-277 ; anterior abdom- 

 inal vein, 73, 276. 



Vena cava, 265, 274. 



Vent, 74. 



Ventricle of heart, 73, 264, 279. 



Ventricles of brain, 103, 291, 293, 

 294. 



Vertebrae, 116, 237. 



Vertebral plate, no. 



Vesicula seminalis, see Seminal ves- 

 icle. 



Visual green, 329; purple, 329. 



Vitelline membrane, 85, 89. 



Vitreous humor, 326. 



Vocal cords, 167 ; sacs, 69, 167. 



Voice, 31, 165, 302. 



Vomer, 232. 



Vomerine teeth, 69, 232. 



White matter of cord, 287. 

 Wolffian body, 113; duct, 115. 

 Wood frog, 20, 354; see also Rana 

 sylvatica. 



Xantholeucophores, 188. 

 Xanthophores, 188. 

 Xiphisternum, 239. 



Yolk, 86. 

 Yolk plug, 95. 



Zaitha, 39. 

 Zygapophyses, 237. 

 Zymogen, 151. 



Printed in the United f tales of America. 



