476 THE DISEASRS AND DISOEDERS OF THE OX. 



future tapeworm, and provided that it be swallowed by a dog, it 

 is capable of being converted into a tapeworm in that animal's 

 intestinal canal. If the above operation has been performed, 

 the wound should be covered with a pitch plaster and a leathern 

 hood, and the sheep ought to be kept in a dark, quiet, and 

 secluded little shed, and fed for the space of a week on soft and 

 laxative food. 



In view of the possibility of any sheeps' heads containing 

 hydatids, they should not be given to dogs as food unless they 

 have been first subjected to the process of being thoroughly 

 boiled ; and, moreover, sheep should never be allowed to graze 

 or feed on land whereon the segments of tapeworms will most 

 probably be lying, if a dog or dogs harbouring a tapeworm or 

 tapeworms has access thereto. 



The name Thorter 111 has been given to another kind of 

 nervous disorder, which is due to the presence of an hydatid 

 in the cervical portion of the spinal cord, whereby more or 

 less marked paralysis of one or both sides of the body may be 

 occasioned. 



The Nematoda, or Order of Thread-worms and Round- 

 worms, comprise not only lumbricoid, or round, worms, properly 

 so called, but also thread-worms. The term derives its origin from 

 the Greek word nema, which means a thread. Of the nematodes 

 or round worms, some are very small, some parasitic, and some 

 free. Those which are free are very minute, and they are found 

 in moss and in water. Some are semi-parasitic, as for instance 

 those which live in the slime on the backs of slugs. There are 

 ten groups of nematodes. Of these we may mention the 

 ascaridfiB, a large family comprising divers forms which infest 

 most of our domesticated animals. The males are provided 

 with two equal spicules projecting from the tail. The ascaris 

 lumbricoides is said to have been found in cattle. The length 

 of the males varies from about 4 to 6 inches, whilst that of the 

 females varies from about 4 to 14 inches. The cucullanidee are 

 provided with large cup-shaped muscular mouths, and infest 

 fishes. The strongylidae infest several of our domesticated 

 animals — e.g. horse, pig, and sheep. The strongyles come 

 under this group. The term strongulos means round or 

 cylindrical. To this order belongs, therefore, the worm known 

 as the Strongylus micrurus^ of which we have spoken as being 



