The Echinoid Directory
Mecaster fourneli (Agassiz, 1847); Camera lucida drawings from Smith, A. B. & Bengston, P. 1991. Cretaceous echinoids from north-eastern Brazil. Fossils and Strata 31, 1-88. Apical disc: BMNH 4009B, 'Senonian', Les Tamarins, Algeria. Aboral surface and oral plating: BMNH EE941, Upper Coniacian, Jebel Metlili, Algeria.