“ Mr. Lyddekker's scientific activities were maintained unwearyingly through the latter half of his life. He catalogued in 10 volumes the fossil mammals, reptiles, and birds in the British Museum; he collaborated with the late Sir W. H. Flower in "The Royal Natural History" (eight volumes) , and with the late Professor H. A. Nicholson in "A Manual of Palæontology" (two volumes) , and he contributed three numbers to Allen's Naturalists' Library and many articles to the "Encyclopædia Britannica." ”