680 
STRUCTURE Ol STEFHANURUS DENTATUS. 
floors off were distinctly heard in the lecture-room, when a 
guitar was placed on the end of a deal rod connected with 
the box. — Journal of the Society of Arts, 
STRUCTURE OF STEPHANURUS DENTATUS, OR SCLERO- 
STOMA PINGUICOLA. 
Dr. W. Fletcher gives a somewhat lengthy account of 
this worm. It appears not to have been correctly known in 
America till last year. A specimen was brought to Dr. 
Fletcher in 1866 by a farmer w 7 hose 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 w orms ; in the bronchial tubes 
down to the minutest branches, they w T ere found in abun- 
dance and in situations w-here no one could have placed them. 
With these specimens his conclusion was that they w^ere the 
Filaria bronchialis of Owen, or Strongylus bronchialis of Cob- 
bold ; and not having at this time made microscopic exa- 
mination of this w r ell-known kidney worm, the relationship 
between them did not occur to him at that time. 
In November, 1870, while demonstrating the portal circula- 
tion in the liver of a pig, full grow- n, he observed a worm which 
measured an inch and a half in length, and in all respects re- 
sembled the kidney worm, and also reminded him of the worms 
he had examined five years before. Upon further dissection of 
the liver he 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 hepatic lobules. 
The gall-bladder was distended with a dirty yellow- ish 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 locality, and finding it oviparous, he 
gave up his opinion as to its being a Filaria bronchialis. 
From the date of this discovery he 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 he has 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 part 
of the animal. Frequently, w hen no w orms were discovered, 
the eggs were abundant in the thick mucous-looking fluid in 
the pelvis of the kidney. This fluid contained, besides eggs, 
