76 Development and Shape of Urinifcrous Tubules 



:\ralpigliian corpuscle) and .7 mm. to the distal convoluted portion and 

 the junctional tubule. As may be seen from the figure, more clearly 

 from the key, the proximal convoluted portion presents one prominent 



Fig. 18. A, uriniferous tubule from kidney of cat embryo obtarined a few 

 days before birth (No. 9); B, tubule from kidney of rabbit embryo 6.5 mm 

 m length (No. 13). X 100. A', B\ keys giving course of coiled portions 

 of tubules, distal convoluted portions shaded, m, Malpighian corpuscles; pc, 

 proximal convoluted portions; es, end segment; dl, descending limb al, 

 ascending limb of Henle's loop; y, junctional tubule. 



