Ct. Carl Huber 



81 



in the proximal convoluted portion to that seen in the descending limb. 

 The loop itself and the ascending arm have a diameter which is about 



Fig. 20. Uriniferous tubule from kidney of cat embryo obtained a few 

 days before birth (No. 9). X 30. m. Malpighian corpuscle; n, neck; .pc, 

 proximal convoluted portion; es, end segment; dl, descending limb; al, ascend- 

 ing limb of Henle's loop; dc, distal convoluted portion; ;, junctional tubule. 



