This picture is of a Arietites bucklandi (Sowerby, 1816) ammonite fossil at the Museo
di Paleontologia at Sapienza University of Rome Italy. This creature
existed in the Jurassic Period. Species was named for William Buckland (1784-1856). Learn more about the museum at: http://www.dst.uniroma1.it/en/structures/museum
Image taken in June 2014.