PARASITES OF ANIMALS. 337 
In the worst cases the accumulation of worms and ova in 
the lung tissue produces an extensive inflammation of these 
organs and renders all treatment unavailing. This has been 
treated by blistering, wine, &c., but rarely with any measure 
of success.”’ 
The Strongylus of the Hog’s Intestines, (Sclerostomum denta- 
tum Rud.) See p. 241, Report for 1870. 
In the last report this species was erroneously described as 
a true Strongylus, owing to the probable occurrence of two 
different but related species in the hog’s intestine, one of 
which is probably a true Strongylus and the other a Selerosto- 
mum. The original species described by Rudolphi appears 
however to belong to the genus Sclerostomum. According to 
Diesing, it had the following characteristics, some of which 
differ from the description given in the report for 1869. 
Head truncate ; border of the mouth with ten or twelve 
small recurved teeth. Body straight, tapering to’ both ends. 
Bursa of the male three-lobed, the intermediate lobe smaller; 
rays three, undivided. Caudal extremity of the female 
straight, subulate, the genital aperture above the apex of the 
tail. Length of the male, 5 or 6 lines; of the female, 6 to 7 
lines; diameter one-fourth of a line. 
The ‘‘Kidney-worm” or “ Lard-worm” of the Hog. (Stephan- 
urus dentatus Diesing, or Sclerostoma pinguicola V. 
Report for 1870, p. 248.) 
Since the publication of the last report much additional 
information has been obtained concerning this destructive 
parasite, which proves to be one of the most abundant and 
widely diffused of all those infesting domestic animals. It is 
also probable that it annually causes greater pecuniary loss 
than any other parasite. 
Soon after the publication of my description of this worm 
in the last report, and also in the American Journal of Science, 
my attention was called to several other cases in New England. 
In one of these, numerous large specimens were found in the 
leaflard of a pig raised in Litchfield county, in this state. 
