INDEX 



321 



Urochorda^ 202 



Urogenital organs of mammals, 298 



sinus, 232, 233 

 Uterus, 6, 278, 298, 300 

 Uterus masculinus, 298 

 Utriculus, 245 



Vagina, 298 



Vagus nerve, 241 



Valves of shell, 54 



Vas deferens, 5 



Vasa efferentia, 232 



Veins, 272, 296 



Veliger, 67, 84 



Velum, 84, 177 



Velum medulke posterius, 236 



Venous sinuses of dogfish, 228 



Ventral plate, 165 



roots of spinal nerves, 188, 279 

 Ventricle, 224 



Vertebral centra, 268 



column, 209, 289 



Vesicula seminalis, 5, 164, 232 



Vestibule, 175 

 Visceral ganglia, 65, 87 



- hump, 57, 70, 76 



skeleton, 209 

 Vitelline glands, 5 



membrane, 164 

 Vitrella, 137, 139 

 Vitreous humour, 280 



Walking legs, see Pareiopods 

 Wheel organ, 177 

 White, Gilbert, 149 

 Wings, 154 

 Wolffian body, 275 

 duct, 232, 277, 298 



Yolk epithelium, 300, 301 



- plug, 252 



pyramids, 140, 142 



sac, 306 



Zygocardiac ossicle. 126 

 Zygomatic arch, 290 



li. X 



