Through the kind intermediary of the Direction of the Botanic Gardens at Kew, the opportunity was given to the author to revise the rather small but very interesting collection of Loranthaceae of the expedition above mentioned. The 17 numbers collected belong to 15 species, of which 4 are new to science, 4 new for Borneo, 5 endemic for Borneo and collected only few times up to the present, whereas only 2 belong to species more common in Borneo and moreover widely spread outside this island.