PARASITES OF ANIMALS. 339 



Dr. Fletcher had, however, already published an interest- 

 ing and important article on the same parasite in the Aineri- 

 can Journal of Science, June, 1871, p. 435, from wliich the 

 followino; extract has been taken: 



" 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 hronchialis of Owen, or Strongijlus hronchialis of Cob- 

 bold, and not having at this time made mioroscropic exami- 

 nations of our well known kidney-worm, the relationship be- 

 tween 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 observed 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 1 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 worms 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 local- 

 ity, and finding it oviparous, I gave up my opinion 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 cysts in 

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

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

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

 the animal. 



