PARASITES OF ANIMALS. 339 
Dr. Fletcher had, however, already published an interest- 
ing and important article on the same parasite in the Ameri- 
can Journal of Science, June, 1871, p. 485, from which the 
following 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 bronchialis of Owen, or Strongylus bronchialis of Cob- 
bold, and not having at this time made microscropic 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 | 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 bronchialis. 
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. 
