Ichthyosaur bones (ribs?)

In the Fossil House, Berlin-Ichthyosaur State Park, Nevada, USA. They've built a shelter over a world-class display of ichthyosaur fossils. Ichthyosaurs were (more or less) the reptile equivalent of dolphins (porpoises); they looked like fish and were marine but were air-breathing. The ichthyosaur here is Shonisaurus popularis of late Triassic age. It's named from the Shoshone Mtns where the fossils occur.