Blastoid Granatocrinus from Iowa

Here are some images of the blastoid fossils from Iowa. They are from the Mississippian or Carboniferous Period. These first two pictures are of the Granatocrinus norwoodi. These specimens can be found on display in Paris, France at Muséum National D'Historie Naturelle Jardin Des Plantes Paléontologie et Anatomie Comparée.

This last image is of the Granatocrinus melo.