474 CATHARINE LINES CHAPIN 



In the 20 cm. free-martin T13, the medulla, in cross section, 

 is shaped like the cortex and medulla of a much smaller, normal 

 female, 7.3 cm., N8 (fig. 13). In size, the gonad is like the ovary 

 of an 8.3 cm. female N7 (fig. 3). Very rarely one finds a germ 

 cell enclosed in a primary follicle. In case 2, a few of the 

 medullary cords (fig. 14), have a very definite arrangement of 

 cells, like that of the seminiferous tubules. Such an arrange- 

 ment, in a larger number of cords (in an older individual) is 

 doubtless what D. B. Hart^ found and illustrated. It was partly 

 because of this that he interpreted the free-martin as an abnor- 

 mal male. Occasional germ cells are found. In case 4 connec- 

 tions between the rete and the medullary cords can be seen 

 (fig. 16). It should be noted that such connection is not found 

 in the normal female, but that in the male the rete is connected 

 with the seminiferous tubules, which are homologues of the 

 medullary cords. No germ cells were distinguished. 



The Wolffian body in all three cases has degenerated, with the 

 exception of the part which forms the epididymis. In case 13 

 there are several connecting tubules between the rete and an 

 enlargement of the Wolffian duct. The Wolffian duct extends 

 straight anteriorly for some distance. Posterior to the vasa 

 efferentia which are straighter than those of the epididymis of a 

 normal d^, the Wolffian duct ends in a posterior enlargement. 

 In the region of the uterus, the Wolffian duct again appears. 

 Here, the duct is not continuous. In places it is represented 

 only by a cord of cells; in other places there is a lumen through 

 this cord. In no place does it have the ciliated lining which is 

 characteristic in the normal cf . 



The tube of the Miillerian duct in T13 is lacking, except for a 

 very small portion, the lumen of which is not more than 0.025 

 mm., long, figure 12 (cf. f-m. 26, page 464). The anterior part 

 of the uterine horns is present, the middle part is lacking and the 

 most posterior part is present but very small and not like the 

 typical Miillerian duct. 



In case 2, the epididymis consists of several vasa efferentia. 

 The Wolffian duct is complete. The more convoluted part lies in 



6 D. B. Hart, Proc. Roy. Soc. Eclinb., vol. 30, 1909-10. 



