Hubert Lyman Clark was an American zoologist. He received the Clarke Medal from the Royal Society of New South Wales in 1947. A son of UMass Amherst president William Smith Clark, he spent more than 4

Centrostephanus longispinus, the hatpin urchin, is a species of sea urchin in the family Diadematidae. There are two subspecies, Centrostephanus l. longispinus, found in the eastern Atlantic and Medit