338 BOARD OF AGRICULTURE. 
These occupied large irregular cavities or cysts, sometimes an 
inch long, containing a considerable amount of dark colored 
and disagreeable matter, like pus, in which niany eggs were 
also found. In some of the cavities two or three worms oc- 
curred together, in others but one. This pig had been dressed 
and sold in New Haven as sound and healthy. By an exam- 
ination of these fresh specimens and others I have been able to 
determine the form and structure of the worm more precisely 
than could be done with the badly preserved specimens origi- 
nally described. Soon afterwards I received drawings and 
specimens of the same parasite from Dr. Wm. B. Fletcher, of 
Indianapolis, Ind., who had also sent specimens to Dr. Cob- 
bold, with information concerning its habits. Dr. Cobbold 
identified the worm with the species described by Diesing* 
from specimens obtained by Natterer in Brazil in a Chinese 
variety of the hog. He also published an article on the sub- 
ject in the Britesh Medical Journal, and in “ Nature,” Jan. 
26, 1871, calling attention to its importance. I have also 
satisfied myself that this identification is correct, on examina- 
tion of the perfect specimens referred to above, although 
Diesing’s description does not apply in all respects to the 
specimens which I have examined. Dr. Cobbold errs, how- 
ever, in supposing that this species has been entirely over- 
looked in this country up to this time, for in 1858, Dr. J. C. 
White+ noticed the occurrence of the same worm (which 
he referred doubtfully to Stephanurus dentatus,) in the leaf- 
lard of a hog. It appears to have been well known to 
pork producers for a long time under the name of “ kidney 
worm.” Dr. Cobbold has published another more lengthy ar- 
ticle on the same subject in Mature, Oct. 1871, p. 508, in 
which he translates Diesing’s original description and gives 
interesting facts received from Dr. Fletcher concerning its 
habits and injurious effects in this country. He also records 
its discovery in Australian hogs by Dr. Morris. 
*Systema Helminthum, Vol. ii, p. 296, 1851. Also in Annalen des Wiener 
Museums, ii, p. 232, Tab. xv. (anatomy), 1839. 
+Proceedings of the Boston Society of Natural History, Vol. vi, p. 428. 
t Monthly Microscopic Journal, Noy. 1871, p. 248. 
