These fossils are members of the Echinoidea family which includes, among others, sand dollars and sea urchins. The skeleton is made of small interlocking plates called a test, and their 5 toothed mouths are commonly called Aristotles lantern. These fossils are found in Majanga, Madagascar and date back to the Cretaceous period. Note:
This is a representative image. You will receive one fossil sand dollar, similar to one pictured here. Each piece ranges from 1.12 to 1.25 inches (3-3.5cm) in diameter.