408 CONTRIBUTIONS TO ZOOLOGICAL PATHOLOGY. 
and pulpy appearance, and its sensibility is so great that any mani- 
pulation of the concha, so as to investigate the condition of "the ex- 
ternal meatus, is attended with great pain, and is also often followed 
with considerable haemorrhage*. 
The second variety of polypous growth, the chondromatous, is 
that which is produced from the lining membrane of the inner 
half of the tube, the dermo-periosteum, and in its structure it 
differs somewhat from the former : it is more dense, and almost 
cartilaginous, and usually having a broad and more sessile base, 
occupies a greater extent of the parietes of the tube. Its surface is 
comparatively smooth, pale, and almost insensible to the touch ; 
but according to the extent of the ulcerative process behind and 
within it, so will the nature and properties of the discharge be with 
which it is accompanied. 
Both these species of polypus of the meatus, the hsematoid 
and chondromatous, are most commonly connected with, and ac- 
companied by, ulceration of the softer tissues, or caries of the 
auditory process. These excrescences are usually situated exter- 
nally to the seat of ulceration, being produced from the vascular 
margin of the ulcer ; and so long as they are permitted to remain, 
the latter morbid condition, the canker of the ear, will be kept up 
for an indefinite period; hence, should the animal be of any value, 
it becomes a matter of considerable importance to arrive at an accu- 
rate diagnosis of the actual conditions of the diseased parts. The 
symptoms, therefore, which attend the existence of polypoid 
growths of the external meatus are very similar to those that indi- 
cate the chronic form of “ internal canker of the ear.” These are 
also preceded by those of general pyrexia, which usher in the local 
disease, such as general languor and lassitude, loss of appetite, 
considerable thirst, turning out of the coat, and balling of the 
fseces. As these constitutional and general symptoms diminish in 
severity, then those characteristic of the local disease become 
gradually and more manifestly evinced. The animal has a dull, 
heavy, and rather watery eye ; he moans or whines at intervals ; 
and if his master be present he feels a pleasure, a confidence, and 
* According to Dr. Pappenheim, a polypus similarly situated and with 
the same physical appearances in man, consisted of an envelope and contents. 
“The envelope consisted of, 1, epidermal cells of various shapes and sizes, 
extended over, 2, a transparent, finely-grained membrane, under which was, 
3, the corium, consisting of pretty st -ong fibres of a yellow colour. The 
contents were resolvable into, 1, a fluid like white of egg; 2, cholesterine 
crystals in great numbers, covered with a very finely grained mass ; 3, epithe- 
lial cells of various kinds ; and, 4, peculiar egg-shaped vesicles, differing much 
in size, with fluid contents, containing very fine grains ; there were also blood- 
vessels and blood globules.” — Vide Pappenheim, Die specielle Gewebelehre 
des Geohororgans, Breslaw, 1840; also Cycloped. of Practical Surgery, art. 
Ear ; and Hearing, Diseases of. 
