REPRODUCTIVE SYSTEM OF FREE-MARTINS 463 



Wolffian tubules which were such a noticeable feature of the 

 Wolffian body of younger females (N8, etc.). Opposite the 

 anterior end of the ovary, a few tubules form the epoophoron, 

 which is the homologue of the epididymis in the male. Through- 

 out the Wolffian body are signs of degeneration such as a large 

 amount of connective tissue, and cells in the lumina of tubules.'* 

 The Wolffian duct has atrophied, although it is present in a 17 

 cm. female sectioned. The Miillerian duct is complete. 



h. Conditions in the free-martin • 



The gonad of the 12.5 cm. free-martin is 1.735 mm. long. 

 The area of the central cross section is one-fifth that of the ovary 

 of the 14 cm. female and one-eighth the size of the testis of the 

 12.75 cm. male. The shape of the gonad resembles that of an 

 ovary of an 8 cm. 9 (fig. 6) . The rete enters the gonad at one 

 side, near the anterior end, but runs posteriorly near the mesen- 

 tery. It is more clearly defined than the rete of the 14 cm. 9 N26. 

 The cords are distinct and have lumina. Connective tissue sur- 

 rounds the rete. On the distal side the connective tissue forms 

 the fan-shaped stroma of the medullary region. In the anterior 

 part of the gland, this region is large but the sex cords are with 

 difficulty distinguished from each other. In the posterior part 

 of the gland are found some degenerating medullary cords which 

 look like those of the female. The few germ cells present are 

 in Schoenfeld's growth stage d. Outside the sex cords and 

 just beneath the peritoneum lies a layer of albuginea, less com- 

 pact than that of the testis of a 12.75 cm. cf . Both the peri- 

 toneum and the albuginea are strikingly like the male of this 

 stage. There seems to be but one set of sex cords present — the 

 homologue of medullary cords of the 9 and seminiferous tubules 

 of the cf. There is no structure present to correspond to the 

 cortex of the normal ovary. 



Neither the Wolfian nor the Miillerian duct is complete. An- 

 terior to the gonad, a groove runs along the genital fold at 

 about the place where Miiller's duct is normally found. In 

 cross section this groove is suggestive of the ostium abdominale. 



