SCLEROSTOMA TETRACANTHUM. 
567 
toma tetracanthum, though the large, round worms (acaris 
megalocephala) have usually been associated with them, as also 
the armed sclerostoma in some cases. In order to convey to 
you some conception of the pathological effects of this par¬ 
asite on the host I will cite some cases that have come under 
my observation. To one in particnlar I will refer in detail, 
as it was under my direct care for three months, and I had a 
g'ood opportunity, of observing the cause of the disease. 
Case i.— In the early part of December, 1891, an eighteen- 
months-old filly was brought to my hospital for treatment. 
The filly presented an extremely emaciated condition, as 
though suffering from some exhausting disease. The hair was 
ong, rough and staring ; left side of the back covered with 
scabs, legs swollen, more especially at hocks, which present¬ 
ed great baggy enlargements, mucous membranes pallid, pulse 
ibout normal and temperature a little below normal. There 
vas a constant rumbling of bowels. Not being satisfied as to 
he cause of the extreme emaciation, she was placed in a box- 
itall to note any further symptoms which might be presented, 
t was soon observed a mild form of diarrhoea was present 
tnd the faeces were very foetid. The appetite was ravenous 
.nd she would drink about as much water as two ordinary 
vork-horses at hard work. When down, was unable to rise 
vdthout assistance though she would struggle to do so. When 
ssisted to her feet would stand around quietly and eat most 
'f the time. Appeared to suffer none, but was just weak and 
ifeless. On examining the fasces, a number of bright red 
mrms from three to five-eighths of an inch long were found 
>n the surface of them. Every passage contained them, and 
hey were always found on the surface, never within the con- 
snts. 
The filly continued to grow weaker for four or five days, 
Ten on attempting to raise her one evening, we were unable 
) do so on account of her perfectly helpless condition. After 
ring all night and struggling most of the time she could not 
ven raise her head from the ground on the following morn- 
lg, and her case seemed almost hopeless. However, with 
he assistance of a sling and two or three men we finally sue- 
