70 VETERINARY PARASITOLOGY 
Whenever prescribing balls in the treatment of in- 
testinal parasites, it is well to paint the papers over with 
a strong solution of salol in ether. The salol is in- 
soluble in the gastric secretion ; solution of the contents 
is retarded, and hence the agents employed reach the 
intestine in a greater degree of concentration. 
If the diarrhcea becomes acute, mild astringents may 
be given, combined with sodium sulphite, in doses of 
I to 2 ounces, as this agent appears 
to exert a very marked action in 
checking diarrhoea of verminous 
origin. Tinct. opii is also very useful. 
OXYURIDES. 
The two members occurring in the 
horse are Oxyuris curvula and Oxyuris 
mastigodes. Oxyuris curvula is some- 
times spoken of as the ‘‘maw-worm.”’ 
The female ranges from 4 to 5 centi- 
metres in length. The body is curved, 
and thickest in its anterior half, while 
the posterior end tapers away into a 
very thin tail. 
The male is rarely seen. It is not 
curved, has only a short tail, and is 
only about ro millimetres in length. 
It possesses a caudal pouch and a 
very fine, straight spicule. 
Bi, ta Oxyuris mastigodes differs from 
URVULA. és 5 
Oxyuris curvula in the remarkable 
length of its tail, Whether it is but an abnormal form 
of the former worm has been disputed. 
The Oxyuride inhabit the large intestine, more 
especially the floating colon, rectum, and diaphragmatic 
flexure of the double colon. The eggs are deposited in 
the neighbourhood of the anus in the form of a yellow 
