SOCIETY MEETINGS. 
137 
ble additional cause of the h3^per3emia of the labyrinth that it 
might come directly from that, for the function of the Eustach¬ 
ian tube is to relieve the drum from excessive tension, and on 
this account there might be a great deal of tension of it. This 
naturally, especially in cases of violent sounds, would produce 
such violent movements of the drum as to increase pressure on 
the internal ear, and through that presumably a congestion 
takes place, so that with the fact existing, as proven by the post¬ 
mortem, there is occlusion of the Eustachian tube in such a 
case, the result seems to be quite philosophical. In the paper, 
which I think, although short, was very good indeed. Dr. Allen 
speaks of congenital or accidental cysts. I could hardly imagine 
a C 3 ^st like that being accidental. I supposed they were always 
congenital. Then regarding his conclusion regarding soundness 
or unsoundness in paralysis of the ear. If he recognized it as 
paralysis, it is a diseased condition. I am inclined to call it an 
unsoundness, and I would not call a horse that has paralysis of 
one or both ears sound. 
Dr. Allen: I think Dr. Baker makes a mistake in saying: 
that I said that dental cysts are congenital or accidental. I said 
that deafness was congenital or accidental. ' 
Dr. Baker : Speaking of congenital deafness. Many cases 
of congenital deafness in both horses and dogs which I found 
o ^ o ^ 
myself were without any external opening. The skin was 
grown right over the auditory canal. Hearing was restored by 
simply cutting and opening through, removing the skin that 
occluded the external auditory canal. Dr. Allen did not refer 
to any particular cases of deafness either congenital or accidental. 
Dr. Cajnpbell: I would like to ask Dr. Allen just in what 
condition we would find a horse in paralysis of the ear. What 
is it, a lop ear ? 
Dr. Allen: What I have seen in cases of paralysis of the 
ear have been in conjunction with paralysis of the lip, and there 
was always a drooping of the ears which I would call a lopping. 
Dr. Ca7npbell: Did you ever hear of horses having had 
something put in their ears that were in that condition ? 
Dr. Allen : I have seen cases of that kind, but they would 
recover after removal of the foreign substance. 
Dr. Wingate: I have seen cases in the West Indies where 
it is called lop ear. I do not know whether it is due to paraly¬ 
sis. It is due to a very large tick that is found there and if not 
looked to in time is apt to destroy the ear, and sometimes the 
ear drops off. This tick seems to be very fond of the ear and it 
