It was said that tortoises differed in the shape of the shells from island to island, and Darwin noted Lawson's statement that on seeing a tortoise he could "pronounce with certainty from which island it has been brought".
Dixéronlle que as tartarugas diferían na forma da súa coiraza de illa en illa, e Darwin anotou a afirmación de Lawson de que ao ver unha tartaruga podía "prononciarse con certeza sobre de que illa a trouxeran".