WOUNDS AND INFI^AMMATION OF THE MEMBRANA 



NICTITANS. 



Like otlisr parts of the ocular apparatus, the third CN^eHd and 

 gland of Harder are subject to accidental injuries of various kinds. 

 What is worse, ignorant persons seeing the cartilage and mem- 

 brane projected over the eye in ophthalmias and tetanus, have 

 mistaken it for a morbid product and deliberately cut it off in 

 part. The condition of the organ may be ascertained by parting 

 the lids with the fingers and pressing gently on the front of the 

 eyeball, when the nictitating membrane will be full}' exposed. 



If detached portions cannot be restored, but threaten to slough, or 

 cause distortions or unsightly and irritating neoplasms they should 

 be seized with forceps and snipped off with scissors. Otherwise 

 the treatment consists in soothing astringent and anodyne Col- 

 lyria as in conjunctivitis. 



TUMORS AND HYPERTROPHY OF THE MEMBRANA 



NICTITANS. 



Neoplasms of this organ may occur in an)' quadruped or bird 

 and may be recognized by the swelling of more or less of its sub- 

 stance, by the unevenness of its free margin, or by distinct out- 

 growths from its surface. Thej^ are especially common in dogs 

 and pigs and may be fibrous, epithelial or otherwise. The treat- 

 ment is purely surgical and in case of a malignant neoplasm 

 should demand the removal of the entire orsran. 



ADENOMA OF THE GLAND OF HARDER. 



Cases in dogs have been recorded b}' Frohner and Schimmel, 

 and it miglit be expected in other carnivora, ruminants, pigs, 

 rabbits and birds. The treatment is by excision with forceps 

 and .scissors, and subsequent treatment with an antiseptic zinc 

 lotion. 



357 



