436 Fletcher on the structure of Stephanurus dentatus, etc. 



This worm was brought to me in 1866, by a farmer whose 

 hogs were dying of cholera. He had removed the lungs of 

 several, and also cut out fragments of the liver, all of which 

 were spotted over with little cysts containing the worms; in 

 the bronchial tubes down to the minutest branches, they were 

 found in abundance and in situations where no one could have 

 placed them. 



With these specimens my conclusion was that they were the 

 Filaria hronchiaUs of Owen, or Strongylus hronchialis of Cob- 

 bold, and not having at this time made microscopic examina- 

 tion of our well known kidney-worm, the relationship between 

 them did not occur to me at that time. 



in November, 1870, while demonstrating the portal circula- 

 tion in the liver of a pig, full grown, I obsen^ed a worm which 

 measured an inch and a half in length, and in all respects 

 resembled the kidney worm, and also reminded me of the 

 worms I had examined five years before. Upon further dis- 

 section of the liver I found the worms not only free in the 

 portal veins, but in cysts in various portions of the organ : also 

 some were found in freshly cut holes, directly across the he- 

 patic lobules. The gall-bladder was distended with a dirty, 

 yellowish fluid, the consistency of soft boiled eggs, and although 

 no wo)-ms were found, yet the ova were abundant, as they also 

 were in the fluid of the cysts. 



Being convinced that the worm formerly examined in the 

 lungs was the same as the worm now found in this new 

 locality, and finding it oviparous, I gave up my ophiion as to 

 its being a Filaria hronchialis. 



From the date of this discovery, I frequented the slaughter 

 houses and pork-packing establishments, and found the worm 

 in most instances in the pelvis of the kidney, or in cvrits in the 

 fat around them. Four times I have found the worm in the 

 bronchial tubes, twice in the hepatic vein and in the right side 

 of the heart ; also in cysts throughout the fatty parts of tiie 



Frequently, when no worms were discovered, the eggs were 

 abundant in the thick mucous-looking fluid in the pelvis of the 

 kidney. This fluid contained, besides eggs, desquamated renal 

 tubules, or casts and oily granules. 



In no instance have I found worms in an immature state, 

 which shows that the eggs, in all probability, go through some 

 other beast before they 'enter the swine, to become :.cxuain 

 mature.* 



The symptoms in hogs, which are referred to the '-kulne}^ 

 worm," are due to a paralysis of motion in the hind legs: tut 



* It is quite as probable that they may hatch in water, and tlius eut t the hogs 

 stomach with ita drink.— v. 



