These Douvilleiceras Ammonites are from the Upper Cretaceous Period of Mahajanga Province in Madagascar.
Ammonites are Cephalopods related to squid and octopus. They had tentacles, eyes and a beak much like their modern cousins.
They range in size from 1 1/2 inch to 1 3/4 inch in size.
Photograph is a general representation of the ammonite you will receive.