OUE DOMESTICATED ANIMALS. 117 



CHAPTER XII. 



Internal Parasites of the Hog — The Pork-tapeworm 

 not so Common as the Beef-tapeworm — Measly 

 Pork — Cysticerci in Westphalian Hams — The Crown- 

 tailed Strongle — Thousands of Swine are infested 



BY THE StEPHANURUS — ITS ORIGINAL DISCOVERY IN 



Brazil — Occurs in the United States and in Aus- 

 tralia — Enterprise of the Public Press in the 

 Cause of Parasitism considered as Useful Know- 

 ledge — The Spiral Fleshworm, or Trichina — English 

 Outbreak of Trichiniasis — Development of the 

 Fleshworm — Other Parasites found in Swine — 

 Entozoa of the Cat — Lumbricoid worms of the Cat — 

 Trichiniasis and Olulaniasis compared — Tapeworms 

 of the Cat — Conclusion. 



" Of all animals, feral or domestic, the common pig is 

 beyond doubt the most fertile source of human entozoa ; 

 at least, of important parasites, the Tricliina spiralis and 

 the tapeworm would, there is good reason to believe, 

 cease to infect us, did not this favourite quadruped act 

 the part of a communicating medium. " 



Thus wrote an eminent biologist in the pages of the 

 Natural History Review for 1865; but, seen in the 

 light of recent discoveries, the statement he advanced is 

 by no means correct. 



The tapeworm alluded to is the Tcenia solium, and my 



