PHYSIOLOGICAL PROPERTIES OF GONADS 371 



November 12th. Mother with two young placed in cage; mother 

 removed periodically: young attempt to crawl under abdomen of male 

 in search of teats, but the latter avoids them, or encircles them uttering 

 male sex call; no sign of female tendencies. When mother replaced 

 in cage, male follows her as would a normal male. The only indica- 

 tion of femaleness is the large, well-developed mammary glands (teats) . 



November 16th. Young remain in cage five hours; watched fre- 

 quently during the time: no inclination toward young. Young at- 

 tempt to crawl underneath abdomen, but male avoids them; no ma- 

 ternal inclinations. Mother upon being replaced in cage is followed 

 almost as consistently as would have occurred in presence of a normal 

 male. 



November 23rd. After young had remained for some hours in cage 

 with male, mother is introduced and young suckle her immediately; 

 after few moments mother quickly removed and young, very excited, 

 rush to male attempting to suckle; vigorous attempts, but male fights 

 them away; no sign of female tendencies toward young. Mother 

 reintroduced, male follows her immediately; typical male reactions. 



February 12, 1919. Male still reacts characteristically as a male, 

 following females as would a normal male. Teats are not so prom- 

 inent at this time, but have become greatly reduced from the con- 

 dition of November and December. At this time the ovarian grafts 

 cannot be palpated and the grafts have evidently been resorbed. 



February 15th. Animal killed. No grafts could be found and only 

 small amount of scar-like tissue marks site of graft. Tissue removed 

 from the site and sectioned. 



Sections of the tissue removed showed that all the original 

 ovarian tissue had undergone degeneration and resorption. 

 The mass contained a great amount of fibrous connective tissue, 

 but all of the characteristic ovarian stroma had been replaced. 



In this animal the ovarian grafts became vascularized, had 

 grown, and were noticeably present for a period of five or six 

 months, and as long as the grafts could be palpated the teats of the 

 animal were very large. In this respect the animal had developed 

 perfectly distinct female somatic characteristics, and it is an inter- 

 esting fact that after the grafts had undergone regression the teats 

 of the animal also reverted to the type of the undeveloped struc- 

 tm'e characteristic of the normal male or castrated female. 



The psychical characteristics of the animal, however, were not 

 modified by the presence of the ovarian grafts; the animal re- 

 tained the psychical disposition of a male throughout the entire 

 period that it was under observation, though its reactions were 



