Shell oval, pointed behind, with three longitudinal ridges.
S. coriacea, Gray, Syn. Rept. part i. p. 51. Testudo coriacea, Linn. Syst. Nat. torn. i. p. 350. Turt. Brit. Faun. p. 78. Coriudo coriacea, Flem. Brit. An. p. 149. Turtle, Borl. Nat. Hist, of Cornw. p. 285. pl. 27. f. 4. Coriaceous Tortoise, Penn. Brit. Zool. vol. in. p. 7. pl. 1. Coriaceous Turtle, Shaw, Gen. Zool. vol. iii. part i. p. 77. pl. 21.
Said to attain the length of eight feet.
This species, which is a native of the Mediterranean, has been occasionally taken in our seas. Borlase mentions two which were caught in the mackerel-nets off the coast of Cornwall, in July 1756. The largest measured six feet nine inches from the tip of the nose to the end of the shell, and was adjudged to weigh eight hundred pounds. Pennant speaks of a third individual, of equal weight with that just alluded to, which was taken on the coast of Dorsetshire. Obs. The anterior extremities in this species are said to he proportionally longer in the young animal than in the adult.