Barrier Reef Molluscs and Planarians from The Great Barrier Reef of Australia 1893 by William Saville-Kent 1845-1908. Fig 1: Flat worm Pseudoceros Kentii Fig 2: Planarian Pseudoceros Dimidiatus Fig 3: Blue spotted Octopus Octopus Pictus Fig 4: Sea-hare A IStockHistory com