colour, and remarkable quick and agile in their 
“mon in some countries than others: in Switzerland, — 
vagina, and about the thighs. 
‘a quarter or two inches in length, marked exter- 
ANT. 54 
stomach ; the case of a Dutch peasant is recordéd — 
by Van Devern, who vomited 40 ells of tape — 
worm. Emetics sometimes thus dislodge them by — 
the mouth. ‘These horrible animals are more com- 
Russia and Germany are frequent, more than in — 
Britain and the United States. They not only 4 
infest very young children but according to 
records, have been found in the alimentary ca- 
nal of the fetus in utero. a 
_ The 4th species of parasitic worm, is the as- — 
aris vermicularis, or thread-worms:—these are — 
about half an inch in length, of a yellowish white — 
movements. They domiciliate in the mucus and — 
thin feces of the colon and rectum, chiefly the — 
ye ean | most likely, on the mucus. They 
are occasionally erratic, having been found in th 
The 5th species of parasitic worm is the trichuris, 
er Tricocephalus dispar, long thread-worm. I 
is a spiral worm, from an inch to an inch and 
nally by numerous transverse annulated lines:— 
one part of the body terminates in a slender hai 
like coil, the other end in a ¢piral convoluti 
ending in a broad obtuse hook, which has been 
compared to the pistil of liliaceous flowers. From 
this extremity the animal puts forth a tube inves 
ina sheath; it is formed generally in the cxc 
or ileum. a 
The disorders which arise from these worms, 
numerous ; and in infancy, not seldom fatal. — 
similarity of the symptoms they produce, to the 
teething, is striking—not always easy to di 
guish between the one and the other ; also to tho 
of dyspepsia, from which they are in like mal 
