WOUNDS AND INFI^AMMATION OF THE MEMBRANA 



NICTITANS. 



Like other parts of the ocular apparatus, the third eyeHd 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 fully 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 Collyria as in conjunctivitis. 



TUMORS AND HYPERTROPHY OF THE MEMBRANA 



NICTITANS. 



Papilloma is seen in the dog (Hobday), epithelioma and lipoma 

 in the horse (Frbhner, Williams), also dermoid (Schimmel). 



Neoplasms of this organ may occur in any 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- 

 growth from its surface. They 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 organ. 



ADENOMA OF THE GLAND OF HARDER. 



Cases in dogs have been recorded by Frbhner and Schimmel, 

 and it might 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. 



359 



