REPKODUCTIVE SYSTEM OF FREE-MARTINS 477 



h. Condition in the free-martin 



The gonad of the 28 cm. free-martin T12 measures 3 mm., in 

 comparison with the 8.260 mm. testis of N19 and the 7 mm. 

 ovary of N28. The rete is the most prominent feature of the 

 gonad. It is much longer than the gland, extending posterior 

 to the sex cord region as well as anterior to it. The diameter 

 of the rete is about one-half the diameter of the entire gonad. 

 The rete lies at one side of the gonad, as in the female, sur- 

 rounded on three sides by sex cord region. The rete cords 

 are very numerous and have large lumina. The sex cord region 

 shows no evidence of organization. It seems to be a homogeneous 

 mass of connective tissue, with no differentiation into cords. 

 A few cells are seen which have large, round nuclei resembling 

 those of germ cells (indifferent stage or Schoenfeld's stage spc. 

 a.) but they do not have the definitely limited cytoplasm char- 

 acteristic of germ cells and probably are not germ cells. No 

 interstitial cells are distinguishable. The thin epithelial covering 

 of the gland and the compact albuginea lying directly beneath it 

 are typical of the male. 



The Wolffian body is represented only by a few tubules, the 

 epoophoron, etc. The Wolffian duct is absent. The anterior 

 portion of the Miillerian duct, the oviduct, is absent but the 

 horns of the uterus are present. 



Summary. The 28 cm. free-martin resembles the male in the 

 absence of cortex, condition of the albuginea and superficial 

 epithelium, extent of the rete, atrophy of the oviduct and pres- 

 ence but non-union of the uterine horns. It is like the female 

 in the position of the rete, degeneration of the Wolffian body, and 

 atrophy of the Wolffian duct. 



6. FREE-MARTIN TWENTY-ONE DAYS AFTER BIRTH 



Besides the free-martin embryos studied, the gonad of a free- 

 martin killed twenty-one days after birth was sectioned (T42). 

 The gonad measured about 13.5 mm. in length and 5 by 3 mm. 

 in cross section at its largest point. Data concerning the size of 

 glands of normal calves is not at hand. 



