On October 20th last died at Haarlem the Dutch Ornithologist Dr. juris Jan Pieter van Wickevoort Crommelin at the age of nearly 61 years. His love for the birds of his country dated from his early boyhood, but the interest in regular ornithological studies was awakened in him by the well-known Zoologist Temminck, an old friend of his father, during the years he passed as a studiosus juris at the Leyden University. Encouraged by Temminck, who introduced him to the Leyden Museum, Crommelin decided, after having taken his degree of Doctor of Laws in 1852, to devote a whole year exclusively to the study of zoology under the able direction of Professor van der Hoeven.