LIST OF ILLUSTRATIONS xix 



FIGURE PAGE 



3. Section of a cryptorchid testicle, showing atrophic tubules, with 



diminished epithelium, aspermatogenesis, thickened and hyaline 

 tubular walls, fibrosis of the stroma, and marked hypertrophy of the 

 interstitial cells 478 



4. Acute pyogenic inflammation of the testicle, low power 483 



5. Acute pyogenic inflammation of the testicle, high power. . The same 



specimen as Figure 4, X 320 484 



6. Early tuberculosis of the testicle 486 



7. Seminoma 487 



The Testicle as a Gland of Internal Secretion 

 Y. D. LESPINASSE 



1. Photomicrograph of the normal testicle of a dog 492 



2. Magnification 325 shows the interstitial cells as large irregular shaped 



cells in between the spermatogenic tubercle . . . . . . . . 493 



3. Picture magnification 1000. This shows the interstitial cells showing 



the nucleus, vacuoles, and granules 493 



4. High power photomicrograph of the nucleus of the interstitial cells to 



show the chromatin rods of the nucleus 496 



5. Low power photomicrograph of a guinea pig testicle whose nerve and 



blood supply was completely severed but the organ allowed to remain 



in the scrotum 498 



6. The entire remaining guinea pig testicle that was replaced in the 



abdomen and veins ligated 499 



7. A low power photomicrograph of the testicle of a dog 3 months after 



the operation 500 



8. Normal testicle of a dog whose testicle was replaced in abdomen with- 



out interference with its nerve or blood supply but whose vas was 

 ligated 501 



9. Epididyinus of abdominal replaced testicle, Figure 8, where the vas 



had been ligated 501 



10. Dog's testicle replaced in abdomen for 34 days after severing the 



globus major from the testicle 502 



11. Dog testicle in abdomen without interference with its nerves or blood 



supply but with ligation of the vas 503 



12. Photomicrograph of the abdominally replaced testicle of a dog . . 503 



13. Gross of two dog testicles showing the normal testicle 504 



14. Note the development of the comb, wattles, head, ear-lobe, and tail in 



the normal unoperated bird 1 507 



15. Note that in bird 2 which has one-fourth of the testicular volume re- 



maining after operation that the comb, wattles, head, and ear-lobes 

 are much less developed than in bird 1, and that the tail still retains 

 its adolescent characteristics 507 



16. Bird 3, with only one-eighth of the testicular volume remaining, shows 



a further hypo development of the comb, head wattles, ear-lobes, and 

 in it you can see the excess development of the tail which is charac- 

 teristic of the castrated chicken , . . . . . .... . 508 



