Note 688 — Chapter XVII

The remains of this reptile were noticed in the "Fossils of the South Downs, or Illustrations of Geology of Sussex," 4to. 1822, p. 47, and subsequently figured in the "Illustrations of the Geology of Sussex, with figures and descriptions of the Fossils of Tilgate Forest," 4to. 1827, p. 60, pl. vi. and vii.; and this extinct Chelone was regarded as a species, characterized by the great development of the rib-plates, and named after Professor Bell, the eminent zoologist, in the first Edition of the "Medals." But in the Monograph, Weald. Rept. 1853, this determination has lately been overlooked; and the specimen figured Tilg. Foss. pl. vi. fig. 2, is referred to the newly named Ch. costata, characterized by its broad and prominent ribs. A third name even (Ch. Mantelli) has been bestowed on this interesting fossil, by a German palæontologist.