Subconjunctival abscesses on the palpebral surface of the nictitating membrane were dealt with in 4 cattle calves. An extensive dermoid was detected on the bulbar surface of the membrane in one sheep. While small dermoids on the palpebral surface of the nictitating membrane are excisable, the extensive ones especially those on the bulbar surface, and associated with keratitis, are most satisfactorily treated by total excision of the membrane. The nictitating membrane may also need to be excised in the severely complicated cases of subconjunctival absceses.