440 



Correlation between Ovaries, etc., in Rabbit. 



Seitz, " Die Follikelatresie wahrend der Schwangerschaft," ' Arch. f. Gynakol.,' vol. 77 

 (1906). 



Steinach, " Willkiirliche Umwandlung von Saugetiermannchen in Tiere mit aus- 

 gepragt weiblichen Geschlechtscharakteren und weiblicher Psyche," ' Pfliiger's Arch. 

 Physiol.,' vol. 144 (1912). 



DESCRIPTION OF PLATES. 

 Plate 17. 



Fig. 1 — Microphotograph of mammary tissue of virgin rabbit (Experiment 1, p. 423). 

 The mammary development is limited to a few ducts. 



Fig. 2. — Microphotograph of mammary glands of virgin rabbit which had ovulated 

 spontaneously about 14 days previously (Experiment 11, p. 425). The glands 

 contained numerous alveoli. 



Fig. 3. — Microphotograph of mammary glands of rabbit from which the uterus had been 

 removed while still a virgin. It was killed 12 days after copulation (Experi- 

 ment 23, p. 430). The glands showed a great development of alveoli. 



Plate 18. 



Pig. 4. — Section through portion of mammary gland of rabbit 24 days after sterile 

 coition (Experiment 13, p. 425). The alveoli contain milk, x 78. 



Fig. 5. — Section through uterine mucosa of rabbit nine days after sterile coition 

 (Experiment 9, p. 432). The glands are very greatly developed, x 35. 



Pig. 6. — Section through uterine mucosa of rabbit 24 days after sterile coition (Experi- 

 ment 13, p. 432). A large quantity of extravasated blood is present. The 

 glands are still somewhat enlarged, x 35. 



Figs. 4-6 were drawn by Mr. Edwin Wilson, of Cambridge. 



