WORMS. 109 



copied by a late writer on Veterinary Patho- 

 logy*; but it appears to me rather strange, 

 that any one who has considered the structure 

 of the horse's intestines should for a moment 

 give credit to it. It seems impossible indeed 

 for these worms to crawl from the anus to the 

 stomach ; and as far as my observation goes, 

 they are never found residing in the intes- 

 tines. Sometimes we find two or three, but 

 they are evidently proceeding towards the 

 anus to be expelled. I have before observed, 

 that I am not acquainted with any medicine 

 that is capable of detaching or destroying 

 these worms, though I have frequently tried 

 , the strongest mercurial preparations, and many 

 powerful medicines. 



I have used the yellow emetic mercur}^, 

 or the vitriolated quicksilver, as recommended 

 by the writer just quoted, as well as everv 

 other mercurial preparation, but never saw a 

 single hot expelled by them. (See Bots and 

 Worms, Appendix.) 



The next worm we have to describe is very 

 slender, of a blackish colour, and seldom exceeds 



Riding's Veterinary PuLhologj. 



