482 THE STOCK owner's ADVISER. 



degree of amaurosis in one or both eyes. Sometimes the animal 

 becomes blind and deaf. AVhen the parasite is lodged in the cere- 

 bellum, the animal's movements are performed without control. 

 The head is elevated; the lim'bs are moved automatically; one 

 or two steps are taken forward, when the animal starts with a 

 bound, but immediately falls and is unable to rise for a time. 



Prevention.^ — The dogs should be treated to prevent the 

 trouble in sheep. 



TAENIA MARGINATA. 



This is very common on this continent, being frequently seen 

 in the Western States. It is found in the mucous membrane, 

 peritoneum, or liver. The life history is the same as that of the 

 taenia copnurus. The parasites generally perish in the liver. 

 They in some cases cause inflammation of the peritoneum. 



No treatment. 



TAENIA EXP ANSA. 



This parasite does not cause much harm. They may be fifteen 

 inches in length, and are found in the intestines. 



Treatment. — Male shield fern, one to two drachms in oil, 

 may be given. Areca nut, one to two drachms in oil, or turpen- 

 tine, three to four drachms, are all good remedies. 



DISTOMATA HEPATICA. 



This parasite destroys the liver of sheep, producing the disease 

 known as " rot," which has caused great losses to sheep-owners 

 throughout England. It prevails on low, marshy lands and 

 during wet seasons. The disease may be detected in the spring, 

 when ewes are dropping their lambs. A sound ewe, in good 

 order, drops a lamb covered with a thick and yellow slime; when 

 the slime is white, thin, and watery, the sheep is not in a healthy 

 condition. Another method by which healthy sheep may be 

 known is by rubbing the flesh backwards and forward between 

 the fingers and thumb, at the ends of the short ribs. If the 

 flesh is solid and firm, she may be considered sound ; if found soft 



