Various sexual apparatus of Aphanomyces euteicbes from 20 day old bard corn-meal agar cul¬ 
tures, illustrating close approximation of antheridial and oogonial stalks; branching of anther- 
idial stalk; size, shape, and interrelation of oogonia and antberidia; character of cross walls 
setting of sex organs; and occurrence of diverticulate branches. Drawn with the aid of a 
camera lucida at a magnification of 1,580 diameters, and reduced in reproduction to a uni¬ 
form magnification of 470 diameters 
