THE LIVER-FLUKE. 



45 



usually commences thirteen weeks after infection, and during 

 the months of November and December. Rapid fattening of 



DEV£/.OPM£Mr. 



OVUM fl) 



CILJATED lAUVA (/J 



SPOROCYST 0) 



A / B I C D\ £\ P 



'R£D/A(e 



CERCARIA fso-/eq) 



'AGAIVOUS CYSTS 

 fSO-/60j 



IN BJLE DUCTS &: LIVER. 



SEXUAL ADULTS 



(so -/so) 

 'OVA ftzso.ooo ro t-oooooo) 



Fig. 11. — Diagram showing Life-history of Liver-fluke. 



WHERE FOUND. 



/N EXCRETA & GROUND. 



/Al WATER Sc MANTLE 

 CAVITY OF UMN/B US. 



AV MA NTL £ CA VITY 

 OF IIMN/E.US. 



/N THE WATER. 



ON GRASS BY WATER SIDE. 



the diseased sheep, fever, and quickening of breath are com- 

 mon sj'mptoms at this stage. Death may now result from 

 apoplexy. The third period is marked by a rapid loss of flesh, 



