110 



THE INTERNAL PARASITES OF 



numbers, are readily got rid of by doses of aloes. The 

 flukes (Fasciola h&patica) are too unimportant and rare 

 to merit attention. As to the strongles which give rise 

 to aneurisms in old horses and donkeys (Strongylus 

 ■a/rmatus), no doubt they are sometimes the cause, of 

 death, but the amount of mortality from this source is 

 exceedingly trifling. The sharp-tailed threadworms, or 

 maw- worms (Oxyuris curvula) certainly may occasion 



Fig. 25. Perfoliate Tapeworm. 



considerable irritation within the larger bowel, but we 

 can easily expel them with purgatives. The worm in the 

 eye (Filaria papUlosa) is confined to tropical countries ; 

 and, moreover, the inconvenience it creates is readily 

 cured by its removal. Lastly, it is almost superfluous to 

 mention the occurrence of the gid hydatid (Ccenurus 

 cerebralis) and other forms of cestode larvae (Gysticercus 



