June 7, 1787 - August 12, 1857.
From Today In Science History:
Conybeare was an English clergyman, geologist and paleontologist, known for his classic work, with co-author, William Phillips, on the stratigraphy of the Carboniferous (280-345 million years ago) System in England and Wales, Outline of the Geology of England and Wales (1822), one of the most influential textbooks on stratigraphy of the period. He also described and reconstructed saurian fossils from the Lyme Regis area of England. He wrote the first monograph on the ichthyosaur, drawing it as a lizard with paddle-like limbs. In 1821 he described the skeleton of the plesiosaurus. As a friend and collaborator of William Buckland, Conybeare was an influential member of the Oxford School of Geology.
Portrait from HERE. Plesiosaur plate from HERE.