LIVER FLUKE. 189 
Ne 
REDIAE SPOROCYST 
Fic. 98.—Diagram of life cycle of liver fluke. 
Upper quadrant, adult in sheep; £%., pharynx; s., sucker; g., gut. Right 
quadrant, free-swimming larva with eye-spots (¢). Lower quadrant, 
sporocyst and rediz in water-snail; & , redia within sporocyst or within 
redia; g., gut in redia; C., cercarie in redia. Left quadrant, free cer- 
caria; g., gut; s., sucker; 7., tail. ’ 
