Another Florida Beach Fossil for ID - Some Sort of Vert

[IndianRiverSonrise]

This one is about four inches long, three high at the highest point, and three wide if the one side wasn't broken.

Thanks for all the help in the past and thanks for help on this one in advance.

 

[Worthy55]

No idea but it's big enough to be horse or bison? 8) 8) 8)