79 



Fig. 5. 



Fig. 6. 



/ S!7? 



Fig. 5. Rabbits embryo 11 days old. From the Wolffian duct the tubule bends 

 inwards and then makes a sharp bend forwards. On the convexity of this bend the 

 future glomerulus forms (G), and moulded on the bend the Bowman's capsule is also 

 seen (Bs. C). 



Fig. 6. Eabbits embryo 14 days old. The Wolffian duct opens into narrow col- 

 lecting tubules (1 ST), these into larger tubules (2 ST) and these again into Malpighian 

 bodies. The three Malpighian bodies represented in figure all open in this way into 

 Wolffian duct. 



be seen, and corresponding with each Malpighian body you have a 

 tube passing directly into the Wolffian duct. Thus in 50 serial 

 sections of a rabbits embryo of 14 days there are 9 Malpighian bo- 

 dies and 9 tubules opening into the Wolffian duct. In 40 serial 

 sections of a chick embryo of six days there are 6 Malpighian bodies 

 and tubules. In fig. 6 the Wolffian body of a rabbits embryo of 

 14 days is seen. From the Wolffian duct narrow collecting tubules 

 pass out, 1 ST. These end in layer secreting tubules, 2 ST, and these 

 again open into Malpighian bodies. 



