248 TRANSLATIONS FROM CONTINENTAL JOURNALS. 
hydrops, in which case the retina and the vitreous humour 
are more voluminous. At the place where the optic nerve 
expands itself into the retina, there exists only the re¬ 
mains of a filament, which comes out of the sclerotica and 
traverses the choroid. The summit of this filament, which 
was primarily attached to the retina, is torn off, as usual, 
in the last stage of the malady, in consequence of the 
increased quantity of the fluid secreted, which has at first 
pulled and elongated it, and thinned the nerve and the 
summit of the retinean cone, and afterwards torn it off, as 
may be seen in several other of the preparations. This 
filament is ten millimetres in length and three millimetres 
in thickness at the posterior part, and one and a half at the 
anterior. The crystalline lens and its capsule are lodged in a 
small cavity (the disorganized hyaloid cavity), inclosed in an 
incomplete sac formed by the anterior surface of the false 
membrane, which latter is formed posteriorly by an agglo¬ 
meration of the retina and the hyaloid, penetrated and 
covered by the newly exudated plastic matter. Anteriorly, 
the false membrane adhered to the still normal iris. Here also 
we find this remarkable disposition, that the capsule of the lens 
may be extremely thickened and coriaceous. On incising it, 
a small quantity of turbid liquid was liberated, which sur¬ 
rounded the yellow but still somewhat consistent nucleus of 
* 
the crystalline lens. But what was my surprise when I 
found that altered, but still covered in its whole extent by 
another thin and perfectly transparent membrane, which 
could easily be detached. It doubled on itself, and was as 
%/ _ ' 
fragile as glass. This membrane formed the external layer 
of the anterior crystalloid. 
3rd and Obs .—Eyes of horses dissected in 1837. 
Ohs. 3 is the right eye of a horse (No. 155).—Ulcerated 
cornea, atrophy of the eyeball, bloody effusion under the 
retina, cataract, capsulo-lenticular. Behind the cornea can 
be seen a reddish tint, owing to blood effused in the anterior 
chamber. On opening the sclerotica, by making a circular 
incision in it, the choroid appeared healthy, but the retina 
seemed to have disappeared. There existed a cavity formed 
by the choroid, the anterior wall of which was formed by the 
retina and the remains of the hyaloid; it was contiguous to 
the posterior capsule of the lens. The anterior part of the 
vitreous humour had disappeared, and the cavity was filled 
with a blood-red liquid. Between the membrane of Descemet 
and the iris was found a layer of plastic blood, strongly 
adhering, a band of which extended to the ulcerated cornea. 
The pupil was completely obliterated. The capsule of the 
