64 VETERINARY PARASITOLOGY 
Nervous symptoms are occasionally seen in the form 
of epileptiform spasms, vertigo, or even tetanic spasms. 
Treatment.— Antimony potassium tartrate un- 
doubtedly stands foremost among the agents employed 
to expel Ascarides from the horse. One drachm should 
be given three or four times daily for four days, and 
followed by a dose of physic. 
Ol. tereb. is often efficacious, given with creosote and 
a full dose of ol. lini. 
Male shield-fern is a well-known remedy, and is 
usually combined with ol. tereb. and ol. lini. 
The following is a common prescription for the so- 
called ‘‘ worm-powders ”’: 
BR Ferri. sulph. .. bi ays -. 3. 
Arsenic ee 8 on --  grs. ij. 
Santonin se ae its +» grs. Xv. 
Pulv. gentianz hs we .. §ss. 
Pulv. anisi ae ar cs oe Bh 
Pulv. locust .. me 3j- 
M. Fiat pulv. 1. Sig.: To be given in first feed daily. 
SCLEROSTOMES. 
‘ 
These worms are commonly known as “ palisade 
worms.” They have chitinous mouths, and are thereby 
capable of doing great damage. 
Two Sclerostomes may inhabit the intestine of the 
horse, and both usually exist in the same animal. These 
are: 
I. Sclerostomum armatum or equinum. 
2. Sclerostomum tetracanthum. 
Sclerostomum Armatum.—This is a short, straight, 
stiff worm, of a whitish or greyish-red colour. The 
female may be known by the straight-pointed tail, and 
measures about 30 millimetres in length, but this is 
subject to great variation. The male possesses a caudal 
pouch, and is about 20 millimetres in length. Occa- 
