REVIEW OF BIOLOGY. 
305 
FLUOR Albus. —A cow had become greatly reduced in flesh 
by the continuous and uninterrupted discharges incident to len- 
corrhea. Roeder introduced a catheter and thoroughly flooded 
the vaginal cavity with thymus serpyllum. After three days he 
again introduced a 5% solution of alum, which he repeated one 
week later, allowing it to remain in the cavity. The animal ex¬ 
hibited symptoms of abdominal pain about ten hours afterward, 
and by straining caused the expulsion of a small quantity of the 
solution which had not been absorbed. Recovery followed 
rapidly and completely. 
REVIEW OF BIOLOGY. 
UPON THE MORPHOLOGICAL VALUE OF HORNS IN HORSES. 
By Mr. L. Blanc. 
Horns in horses are constituted by a skeleton base covered 
by a normal, or horn-like skin. These appendages are situated 
on the frontal bone, inside the base of the orbital process, about 
the frontal foramen, at a point corresponding very nearly to the 
place of the horns of ruminants of the ovine type. 
The skeleton axis is formed by a cartilaginous nucleus which 
is ossified in animals advanced in age; crescent in shape, with 
the concavity inward, projecting, or almost on a level, with the 
frontal, in which it is imbedded as a tooth in its alveola. 
Most ordinarily the ligament is normal, round, and on a 
level with the horn. Sometimes the epidermis undergoes the 
horny transformation, and then there is a conical envelope, two 
or three centimeters long, fibrous in appearance, and having the 
structure of the young horn of the hoof of horses. 
These horns are not, by their axis, part of the frontal; they 
belong to the primordial skeleton of the cranium, and are formed 
by the extremity of the apophysis of Ingrassias. 
On any colt, the wing of the anterior sphenoid is continued 
outwards and upwards by a cartilaginous lamella, fan-shaped. 
This lamella penetrates into the depression of the orbital por¬ 
tion of the frontal, then, a little more upwards, goes into a deep 
