EQUINE ENTOZOA. 33^ 



form of the taenia coeniirus of the dog. Its full description 

 will be more appropriately treated of in works on ovine 

 pathology. 



It is rarely found to affect the horse, one authenticated 

 instance of its presence in the brain only being recorded. 



3. CYSTICERCUS FISTULARIS, or Long Bladder-worm 

 of the horse, is probably only a variety of the C. tenui- 

 collis of ruminants. 



The muscle-flesh of horses is not liable to be infested by 

 cysticerci, 



III. NEMATODES, OR ROUND-WORMS. 



The nematodes (i/s/xa, a thread) comprise not only the 

 round-worms, but also the thread-worms and the strongyles 

 (this latter term meaning round or cylindrical). 



Included in this group are several families, among which 

 are the 



1. Ascaridse. 



2. Cheiracanthidae. 



3. Cucullanidse. 



4. Strongylidae. 



5. Trichinidae. 



6. Oxyuridae. 



7. Trichocephalidae. 



8. Filaridae. 



9. Gordiidae. 

 10. Anguillulidae. 



The chief nematodes which infest the horse are the 

 following : 



1. ASCARISMEGALOCEPHALA, or Lumbricoid Worm. 

 — This worm is distinguished from the lumbricoid worm of 

 man and pigs by its greater number of caudal papillae. In 

 length, the male of this species is rarely over seven inches, 



22 



