In Oregon Fossils by Elizabeth and William Orr, state that members of the Genus Natica live in a continental shelf environment. This specimen measured 8.99mm on the long axis of the image, and 7.39mm on cross section. Climate conditions changed from sub-tropical to temperate in between the Keasey and the Pittsburg Bluff formations. There is only about a 10% species overlap. The Genus Natica is still living today. I was unable to find a species ID reference for this specimen. I have found significantly larger specimens of this Genus in the Pittsburg Bluff formation. The specimen is partial shell and cast from the shell (basically the foot is cast).