Internal Parasites. 221 
Vienna in 104 out of 144 dogs dissected for that purpose; 
and Dr. Krabbe obtained it at Copenhagen in 122 instances 
from the fost-mortem examinations of 500 dogs. 
According to my own experiences, it occursin English 
dogs at the rate of about seventy per cent. Occupying 
principally the small intestines, but often wandering into 
the stomach, and occasionally also making its way into the 
throat and nostril, this parasite is a frequent source of severe 
intestinal disturbance, sometimes producing even death 
itself. Cats and dogs alike are constantly throwing them 
up, and it is a great relief to the host when they are thus 
dislodged. Their occasional passage by the ordinary 
outlet is also a matter of common observation ; but it is 
not so very generally understood that these modes of 
egress are often the result of a voluntary wandering on the 
part of the guest. This is practically of some moment, 
because it accounts for the circumstance of their being 
sometimes found in the nasal passages, and in other unusual 
situations. 
The formidable nature of the symptoms which may thus 
be superinduced have been fully indicated in a letter of 
mine which appeared in the #ze/d for December 21, 1872. 
Under ordinary circumstances, the symptoms in the dog 
are those of irregular intestinal action, accompanied with 
nausea and spasmodic colic, irritation, a voracious appetite, 
and more or less loss of flesh. In addition, there may be 
foetor of the breath, accompanied by a short husky cough, 
and an impoverished state of the coat ; and, either with or 
without any of these symptoms, there may be more or less 
paralysis. I may here make mention of an interesting 
case of paralysis in puppies brought under my notice by 
Mr. Lewis (/veld, December 7, 1872), in which it was 
_ instructive to notice how complete a cure followed the 
administration of a simple aperient drug. Quite recently 
also a correspondent, writing from Ceylon under the 
signature of “Weddah,” gave a suggestive instance where 
