_ is a white worm, one-half to 1 inch long, which
inhabits the lacrimal duct and the underside of the eyelids and haw in
the horse, producing a verminous conjunctivitis. The first step in
treatment in such cases is to remove the worm with forceps, then treat
as for external inflammation.

_Setaria equina_ is a delicate, white, silvery-looking worm, which I
have repeatedly found 2 inches in length (a length as great as 5 inches
has been reported). It invades the aqueous humor, where its constant
active movements make it an object of great interest, and it is
frequently exhibited as a "snake in the eye."[1] When present in the
eye it causes inflammation and has to be removed through an incision
made with the lancet in the upper border of the cornea close to the
sclerotic, the point of the instrument being directed slightly forward
to avoid injury to the iris. Then cold water or astringent antiseptic
lotions should be applied.

_Filaria conjunctivae_, resembling _Setaria equina_ very much in size and
general appearance, is another roundworm which has been found in the eye
of the horse.

The echinococcus, the cystic or larval stage of the echinococcus
tapeworm of the dog, has been found in the eye of the horse, and a
cysticercus is also reported.

FOOTNOTES:

[1] This worm is normally a parasite of the peritoneal cavity, and is
probably transmitted from one horse to another by some biting insect
which becomes infected by embryos in the blood.--M. C. HALL.

LAMENESS: ITS CAUSES AND TREATMENT.

BY A. LIAUTARD, M. D., V. M.,

_Formerly principal of the American Veterinary College, New York._

[Revised by John R. Mohler, A. M., V. M. D.]

It is as living, organized, locomotive machines that the horse, camel,
ox, and their burden-bearing companions are of practical value to man.
Hence the consideration of their usefulness and consequent value to
their human masters ultimately and naturally resolves itself into an
inquiry concerning the condition of that special portion of their
organism which controls their function of locomotion. This is especially
true in regard to the members of the equine family, the most numerous
and valuable of all the beasts of burden, and it naturally follows that
with the horse for a subject of discussion the special topic and leading
theme of inquiry, by an easy lapse, will become an inquest into the
condition and efficiency of his power for usefulness as a carrier or
traveler. The