TUMORS OF THE MEMBRANA NICTITANS 523 



membrane stands out prominently and extends over a portion 

 of the cornea. A protrusion of the membrana nictitans is 

 observed in tetanus, which should not be mistaken for an 

 inflammatory condition. This can easily be distinguished 

 by other symptoms of tetanus appearing in other parts of the 

 body. 



Prognosis. Favorable in most cases. It may terminate 

 in a chronic inflammation in which case the membrana 

 nictitans will remain permanently thickened. 



Treatment. The entire membrane should be inspected 

 closely for foreign bodies. Flush out the membrane daily 

 with boric acid solution (2 per cent.). 



If in the course of two or three weeks the swelling has not 

 subsided, it would indicate a chronic inflammation. In this 

 case the removal of the entire membrane is recommended. 



WOUNDS OF THE MEMBRANA NICTITANS. 



In small animals wounds of the membrana nictitans are 

 produced by the same causes as those producing traumatic 

 conjunctivitis elsewhere. As a rule they are of little impor- 

 tance unless very extensive or followed by marked granula- 

 tion . Antiseptic and astringent solutions usually suffice to heal 

 them. If extensive granulation occur, it may be necessary 

 to extirpate the entire membrane. 



TUMORS ON THE MEMBRANA NICTITANS. 



Various tumors have been found on the membrana nicti- 

 tans. It is advisable in all cases to remove the membrane 

 surgically. 



