xx LIST OF ILLUSTKATIONS 



FIGURE * PAGE 



17. Bird 4, with only one-sixteenth of the testicular volume present, one 

 can note a further hypo development of comb, wattles, ear-lobes and 

 head, and a greater development of tail; also increase in size is 

 beginning to show itself "... 508 



18-19. In 18 and 19 where one thirty-second of the testicular volume was 

 allowed to remain, note the very small head, comb, wattles and ear- 

 lobe, and also note the development of the tail . 508 



20-21. In Figure 20, a very small amount of testicle was left, designated 

 as "pinhead," but at autopsy this small piece had sloughed, so this 

 bird is completely castrated, as is also bird 21 509 



22-23. Birds 22 and 23 are two Khode Island red cockerels. When one 

 month old we transplanted into bird 23 two adrenal glands, .placing 

 them in the muscles of the breast 509 



24. Mild grade of eunuchoid 513 



25. Mild grade of eunuchoid 513 



26. Boy 19 years old, six feet four inches tall 518 



27. Note long arms, feminine distribution of hair, etc 518 



28. Typical eunuchoid 519 



29. Photomicrograph of a testicle removed from a cockerel two months 



old and placed in a two months old pullet on the site of the removed 

 ovary 522 



30. A high power photomicrograph of Figure 29 showing the formation of 



spermatozoa in the transplanted testicle 522 



31. Barred rock pullet whose ovary was removed, and in place of which 



two testicles were transplanted on the ovarian site 523 



SECTION V 



The Prostate Gland as an Endocrin Organ 

 DAVID I. MACHT 



1. Eana sylvatica. Effect of prostate feeding from April 20 to May 19. 



Ram's prostate was used 528 



2. Rana palustris. Large tadpoles were fed with some ram's prostate for 



two weeks, and some with parotid gland. No difference in size and 

 development 528 



3. Rana palustris. Feeding of ram's prostate 529 



4. Bufo lentiginosus. Metamorphosis produced by feeding ram's prostate 



from May 12 to June 6 529 



SECTION VI 

 THE FEMALE GONADS AND THEIR DISEASES 



Anatomy, Embryology, Comparative Anatomy and Histology of the 

 Endocrin Components of the Ovaries 



E. V. COWDRY. 



1. Interstitial cells in the human ovary 538 



2. Section through the covering of a normal bat's ovarian follicle . 541 



