146 Embryonic Development of Ovary and Testis of Mammals 



PLATE IV. 



Fig. 11. Rete cord in rete ridge. Pig embryo, length 1.8 cm. x 893. 



Fig. 12. Seminiferous tubules and stroma of testis. Pig embryo, length 

 1.8 cm. X S93. 



Fig. 13. Seminiferous tubule and stroma of testis (transverse section). 

 Pig embryo, length 3 cm. x 893. 



Fig. 14. Seminiferous tubule of testis (longitudinal section). Pig embryo, 

 length 7.5 cm. x 893. 



PLATE V. 



Fig. 15. Capsule of Bowman and rete cords. Pig embryo, length 4 cm. 

 X 893. 



Fig. 16. Capsule of Bowman and rete cords. Pig embryo, length 7.5 cm. 



Fig. 17. Intra-ovarian portions of rete cords. Pig embryo, length 8.5 cm. 

 X893. 



Fig. 18. Tubulus rectus and seminiferous tubule. Pig embryo, length 

 13 cm. X 893. 



PLATE VL 



Fig. 19. Seminiferous tubule. Pig embryo, length 15 cm. x 893. 



Fig. 20. Follicle in intra-ovarian rete. Pig embryo, length 15 cm. X 893. 



Fig. 21. Rete tubule of testis. Pig embryo, length 13 cm. x 893. 



Fig. 22. Portion of cortex of ovary. Rabbit embryo, 23 days. X 893. 



Fig. 23. Seminiferous tubule (longitudinal section). Rabbit embryo, 21 



days. X 893. 



Fig. 24. Seminiferous tubule (transverse section). Rabbit, 24 days after 



birth. X 893. 



PLATE Vn. 



Fig. 25. Cord of Pfliiger, with lumen. Pig embryo, length 15 cm. x 893. 



Fig. 26. Tissues of a rabbit ovary. 78 days after birth, x 893. 



Fig. 27. Interstitial cells in process of amitotic division. Rabbit ovary, 

 93 days after birth, x 893. 



Fig. 28. Interstitial cell of ovary. Virgin rabbit, 6 months old. x 893. 



Fig. 29. Interstitial cell of ovary. Rabbit in 14i/^ day of first pregnancy. 

 X893. 



Fig. 30. Lutein cell of corpus luteum, same animal as for Fig. 29. X 893. 



