20396 - Great Huge 5.51 Inch Polished Goniatites Devonian Cephalopod Shark teeth bulk Agassiz 1836 (heart urchin)

Agassiz 1836 (heart urchin)

Neltneriidae and Holmiidae (Trilobita) from Morocco and the Problem of Early Cambrian Intercontinental Correlation

whose surface has been coated with metal to give them an iridescent metallic sheen

These "claws" look like claws on the claw end

Micraster cortestudinarium

20396 - Great Huge 5.51 Inch Polished Goniatites Devonian Cephalopod Shark teeth bulk Agassiz 1836 (heart urchin)Impressive example of this Devonian cephalopod. Huge specimen. It has been lightly polished to appreciate in detail its structures. The characteristic lines of suture of this cephalopod of the Paleozoic can be perfectly observed. Nice specimen.