This is a picture of an unidentified sponge fossil.  The fossil was found in the Jeffersonville Limestone of Clark County, Indiana, USA...

Here are some pictures of a reptile like amphibian that lived during the Permian Period. It is from the mobile phone game Jurassic World ...

This is a picture of an intact blastoid. These types of fossils are somewhat rare. It appears to be an  Elaeacrinus verneuili (Römer [aka...