t 



ILLUSTRATIONS 



[From drawings by Juan Castro.] 



Plate I. Female pig embryo, 14 centimeters long. x3. 



TEXT FIGURES 



Fig. 1. Schematic drawing of abdominal cavity with intestinal coils re- 

 flected. x3. A, B, G, H=l3rmphoid collections; F=adrenals; 

 X)=mesenchymatous body; i7= right ovary; C= upper end of right 

 ureter. 



2. Section of upper end of ureter (right). L«=lumen of ureter; Mt~ 



mesenchymatous tissue. Objective 6; occular 4, Leitz. 



3. Section of lower end of right ureter. Lu=lmn&a. of ureter. Ob- 



jective b; occular 4, Leitz. 



201 



h 



