CONYBEARE, WILLIAM DANIEL dean of Llandaff, English geologist, born in London on June 7, 1787, was a grandson of John Conybeare, bishop of Bristol and son of Dr. William Conybeare, rector of Bishopsgate. Edu cated at Westminster school and Christ Church, Oxford, he held various cures in southern England. He was appointed Bampton lecturer in 1839, and was instituted to the deanery of Llandaff in 1845. In 1821 he described a skeleton of the Plesiosaurus discov ered by Mary Arming, and his account has been confirmed in all main points by subsequent researches. Among his most important memoirs is that on the south-western coal district of England, written in conjunction with Dr. Buckland, and published in 1824. His principal work is the Outlines of the Geology of England and Wales (1822), being a second edition of the small work issued by William Phillips and written in collaboration with that author. He was a fellow of the Royal Society and a corresponding member of the Institute of France. He died in Itchenstoke, near Ports mouth, on Aug. 12, 1857. (Obituary in Gent. Mag., Sept. 1857, 1)- 335. )