Y'nM 



01 



02 



03 mm. 



q oi 2 mm. 



Fig. 29. Stages B, C and E of Fig. 28 shown in greater detail. 



B. Two collecting tubes are approaching the periphery and two basin-shaped thickenings have formed. 

 Note that the blind ends of the collecting tubes are deeply stained as are the " Anlagen". 



C. The " Anlage" on the left of the drawing is seen to be two-layered and to contain a cavity. 



E. The young capsule has rotated inwards and has now a wide cavity: one wall is thin and the other, 

 which will form the glomerulus, is thick and deeply stained. The capsule is still connected by a cord of 

 cells with the periphery (/). 



a. Collecting tubes. 



b. Young capsule. 



c. Older tubules in section. 



d. Section of an older capsule containing a func- 

 tional glomerulus. 



c. Young tubules in section. Note that they are 

 more deeply stained than the collecting tubes. 



/. Cord of cells connecting the young capsule 

 with the periphery. 



