5. Malayan and African Rubbers.—

These products have the point in common that they are produced by nearly allied, though distinct, climbers belonging, like Alstonia referred to above, to the natural family Apocynaceæ. Much information about them, accompanied by specimens and sketches, has been received at Kew from Mr. Murton, Superintendent of the Botanical Garden, at Singapore, page 40 Mr. Burbidge, during his travels in Borneo for Messrs. Veitch, Mr. W. H. Treacher, the Administrator of Labuan, and Dr. Kirk, Her Majesty's Consul-General at Zanzibar. The complete study and examination of these materials has not yet been completed, and the results will be given in the next Kew Report.