CONTENTS. IX 



PAGE 



Definitive circulation 280 



Heart . . . . ,. .281 



Aortic arches 282 



Arteries 284 



Veins k . . 289 



Fcetal circulation 293 



Circulation in the separate classes 294 



Lymphatic system . 302 



Urogenital system 307 



Excretory organs 308 



Reproductive organs 3x9 



Reproductive ducts 321 



Excretory organs of the separate groups 326 



Reproductive organs of the separate groups 331 



Copulatory organs - 342 



Hermaphroditism 346 



Fcetal envelopes 348 



Adrenal organs 3^2 



Bibliography 354 



Definition of systematic names 381 



INDEX 385 



