9O J. M. ESSENBERG. 



PLATE VII. 



FIGS. 33-36. Transverse section of radial tubules to show transformation 

 of tubule epithelium into definitive germ cells. X 1600. 



Symbols : 



et Epithelium of tubule. 



fgc Fully formed germ cells. 



mp Membrana propria. 



Irt Lumen of radial tubule. 



