Polished Douvilleiceras Ammonite Group Cretaceous Period, 145-65 million years B.P. A group of four Douvilleiceras sp. ammonites, also known as a goat horn, polished to reveal rich calcites and striking suture patterns; held in a white card collector's tray. 62-79 grams, 52-60 mm wide (306 grams total, 93-130 mm including tray) (2 - 2 1/3 in. (3 2/3 - 5 in.)). Jungles of Mahajanga, NE Coast of Madagascar. Acquired 1950s-1960s. Bristol paleontological collection. [4, No Reserve]