PLATE 2 
EXPLANATION OF FIGURES 
7 Dissection of urogenital system in anormal hen. d, oviduct; 0, the ovary; 
u, a ureter; v, a vas deferens. 
8 Section of ducts entering cloaca inanormalhen. a, is artery, u, the ureter, 
v, the vas deferens, or Wolffian duct. 
9 Same as v in figure 8, showing columnar epithelium of the vas in a normal 
hen. 
