68 



FRANK R. LILLIE. 



also with it in the much sparser distribution of the nuclei, evidence 

 of complete cessation of its activity. 



It would thus appear that the characteristic proliferation of the 





Fig. ii. Detail of area designated in Fig. 10a. Free-martin, No. 62. 1. 

 Germinal epithelium; 2. Albuginea ; 3. Primary sex-cords (medulla). 



ovary was halted in the free-martin at a stage not later than 3.0 

 cm. As will appear from the work of my student, K. F. Bascom, 



,<-■?". 





•••:•' P 







4'SI 



-:- ' / • * 



Fig. 12. Detail of area designated in Fig. iofo. Male twin, No. 62. 1. 

 Germinal epithelium; 2. Albuginea; 3. Primary sex cords (seminiferous tub- 

 ules) and interstitial tissues. 



soon to be published, recognizable differences between the testis 

 and ovary, concerning the germinal epithelium and albuginea, may 



