28 



Development and Shape of Uriniferons Tul)ules 



Fig. 3. A series of figures, A to / of sagittal sections of tubular anlagen 

 and uriniferous tubules in early stages of development, showing successive 

 stages in the development of the uriniferous tubules, from a human embryo 

 of the seventh month (No. 16). x 160. In each figure of this series, there is 

 reproduced the most typical section of the several series of sagittal sections 

 used in making the reconstructions shown in Fig. 4. (The corresponding 

 tubules in Figs. 3 and 4, are designated by the same letter.) 



