The following list with notes on the birds of British North Borneo is based on specimens collected by Mr. Seikichi Tanaka, M.O.S.J., who has visited to the island between the early part of September and the end of October of the last year (1923). The specimens I have referred to 19 species and subspecies including an apparently undescribed form of a oriole which I propose to call by the name of Oriolus xanthornus tanakae.