EXTRACTS FROM GERMAN PERIODICALS. 
579 
not unlike an ordinary foreign body, with congestion and 
maceration at this point. 
As a consequential result there followed an inflammatory 
process, which weakened the now thin separating wall, and 
permitted an intermingling of contents so sudden and violent 
in intensity, as to tear the internal coat of the vein, producing 
the valve-like flat previously spoken of. 
Had the rupture and interchange been less rapid, there 
would have been formed thrombi, which could obviously have 
caused some manifestation of ill health. 
This is the only case of this nature to be found in our lit¬ 
erature, and for this reason we have been somewhat elaborate 
in its description.— Berl. Th . W. 
KERATITIS MACULOSA IN THE HORSE. 
A three-year-old mare, brought to the Vienna clinic on ac¬ 
count of blindness, came under the care of Prof. Bayer. He 
found the morphological appearance of the organs normal; 
complete absence of swollen lids, photophobia, congestion of 
the conjunctiva and superfluous secretion ; both orbs of the 
same size. At the side of the cornea, adjacent to the inner 
canthus of the left eye, a superficial cloudiness could be de¬ 
tected about three mm. in width. 
By focal illumination this resolved itself into a number of 
minute points entirely independent and distinct from each 
other. They were in the most external strata of the cornea, 
and also in the subepithelial layer. The contour of the tians- 
parent coat at this point was irregular, as shown by the oph¬ 
thalmoscope. Injection or hyperaemia of the sclerotic not 
present. 
Prof. Bayer had first heard of such a corneal disease under 
the head of “ Keratitis Maculosa” in the Vienna Weekly Clinic 
of 1889 ; this was described by Prof, von Reuss, and had oc¬ 
curred in a man at the Vienna hospital. Reuss was invited 
to examine this horse, and gave it as his opinion that the le¬ 
sions present were precisely the same as in his own patient. 
The same disease was again seen in Bayer’s clinic a short 
