ANT. } $2 
be the better prepared to hear of the articles sup- 
posed to be suited to the expulsion or destruction 
of each ; and that they may know when to apply | 
either of the numerous remedies reputed to pos-— 
sess anthelmintic virtues. ‘These considerations 
are the more interesting to the student, and require 
the more of his attention, from the fact, that not. 
withstanding all the attention which has been pai 
to this subject, by enlightened men, it isa melan- 
cholly truth, that but little of certainty has resulted 
beyond the clear exposition of the natural history 
of these animals. We still know, comparatively 
with the laborious investigations on the subject, 
_ but little of the general pathology of worms 
little of the symptoms they immediately excite. 
What is known the student should possess him: 
of thoroughly. Before detailing the heads of these 
points of discussion, it is necessary to know tl 
the intestinal canal is infested by five different 
kinds of worms, * 
1. The Lumbricus teres, or round worm: Re- 
sembles the common earth worm, but presents 
many discrepancies of structure, is from 8 to 
inches long, infesting chiefly the jejunum and 
eum, is sometimes erratic, proceeding to the st 
mach, throatand mouth, mostly in pairs, not a 
_ frequently thirty or forty have been found tog 
er, and rarely solitary. Affect the system um 
15, most generally under 8 years, and rare 
adults. : mica 
2and 3. The tenia, or tape-worm, so called 
its resemblance to tape ; is very long, from 20 t 
feet, and cases much longer have been reported: 
fests the upper part of the intestines of children 
adults, feeding on chyte. Sometimes soli 
erally imagined to be always so, not strictly 
Dr. Nitret mentions a woman who dischargeé 
The detached joints of one kind resemble 
