xii CONTENTS 



I'A<;K 



I. URINO GENITAL ORGANS (general description and develop- 

 ment) 441 



Pronephros 443 



Mesonephros 445 



Metanephrous 446 



Male and Female Generative Ducts 446 



Gonads 450 



URINARY ORGANS 452 



of Amphioxus 452 



of Fishes 452 



of Amphibians 455 



of Reptiles and Birds 459 



of Mammals . . . 461 



GENITAL ORGANS 463 



of Amphioxus 463 



of Fishes . 463 



of Amphibians . 469 



of Reptiles and Birds 474 



of Mammals 477 



ACCESSORY GENITAL GLANDS OF MAMMALS 484 



COPULATORY ORGANS 486 



ADRENAL BODIES 492 



APPENDIX (Bibliography) 497 



INDEX 565 



