330 
W. L. WILLIAMS. 
stricted, apparently from excessive contraction of the cicatri¬ 
cial tissue, the right arytasnoid cartilage being drawn down¬ 
wards and inwards. The muscles of the right arytasnoid 
cartilage were of normal volume and appearance, and in all re¬ 
spects, except as noted, the larynx appeared natural. 
The extreme dyspnoea was apparently the result of the 
constriction at the upper portion of the larynx, with the re¬ 
sultant displacement of the remaining arytasnoid cartilage, but 
were this overcome, we are still confronted with the cricoid 
and tracheal constrictions, which although probably less im¬ 
portant than the other, are yet quite serious. 
A careful study of this larynx in situ with the known 
facility with which the animal swallowed during life, would 
seem to show that both arytasnoid cartilages can be removed 
by the Fleming method, with the same impunity as one, in so 
far as swallowing is concerned. Whether the oesophagus 
would in such a case descend low enough to partially occlude 
the laryngeal opening and thus still interfere with inspiration, 
is a point upon which we could not hazard an opinion. How¬ 
ever, is not the removal of the right cartilage the most prom¬ 
ising plan for successfully reclaiming some of those roarers 
which are still useless after the excision of the left ary tasnoid ? 
To what shall we attribute the pathological changes enum¬ 
erated? First, it is quite evident that almost from the start, 
the operation was not as neatly done as might have been. 
Dr. Fleming’s treatise—“Roaring in Horses”—fails to fore- 
warn the inexperienced operator regarding the large collec¬ 
tion of viscid mucus which we encountered in the larynx and 
which it was necessary to remove, before attempting excision 
of the cartilage, and we inadvertently attempted to dislodge 
it with the handled sponges, whereas the large syringe which 
was at hand, as advised by Dr. Fleming for other purposes, 
should have been used here to withdraw the mucus, and no 
time would have been needlessly sacrificed. 
This collection of mucus, judging from our literature, is 
probably very rare, there having been no previous mention 
made of it so far as we have seen. The temporary frustra¬ 
tion of our plans in this way could only have a secondary in- 
