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TUMOURS AND FUNGUS OF THE ORBIT. 



Cases of this description will every now and then occur in prac- 

 tice, varying more or less in their kind and character ; and I believe 

 that injury of some sort — blows most likely — will be found to be 

 the common originator of them. I remember the case of a horse 

 belonging to the Artillery, in which an exostosis proceeding from 

 the orbital arch had grown to the magnitude of a horse-chestnut, 

 and by a tendency downwards had half obstructed vision, inde- 

 pendently of the mischief it was doing by pressure upon the eye- 

 ball. This case admitted of operation. 



Of the several cases of fungus growing from or connected with 

 the orbit that have come to my knowledge, the following, arising 

 in congenital defect, is one of the most curious : — 



Mr. Perry, V.S., SwafFham, Norfolk, was, in July 1832, re- 

 quested to see a foal three days old, which was said " to have no 

 eyes." He went to see it, and to his surprise " found within the 

 orbit, on the near side, an excrescence of fungus, about the size of 

 a common pistol-ball, without any organic structure. In the other 

 orbit it was somewhat larger, answering in appearance to the 

 former, with the addition of the membrana nictitans." — Veterina- 

 rian for 1834. 



