PLATE XV 



EXPLANATION OF FIGURES 



20 Adult cat (Darrach Series), Type AD. Persistence of right and left 

 posterior cardinal veins. Ureters pass between aorta and caval veins. 



21 Adult cat (Darrach Series), Type AD. Persistence of right and left 

 posterior cardinal veins. Ureters pass between aorta and caval veins. 



.22 Adult cat (Darrach Series), Type AD. Persistence of right and left 

 posterior cardinal veins. Ureters pass between aorta and caval veins. 



86 



