Those are the "fossil bones" of a mesonychid. Not too long ago the paleontologists had a carefully plotted linkage from those bones to Flipper. Then real science stepped in and provided overwhelming evidence that whales and hippos are kissing cousins. That left the flustered bone-pickers rather speechless for a fraction of second. Science being what it is, something had to give, not the theory, but the evidence was changed. Things that were huggably close to the mesonychid have stepped a small distance away. The predictions have been forgotten and have not been counted against the theory. The theory remains intact unmarred by the "changed" evidence. Thus my attributing "Paleontologists suck as paleontologists".