B. F.  Perkins, ?Hindeastraea discoidea White from the Eagle Ford Shale, Dallas County, Texas?, Fondren Science Series, vol. 2, pp. 1?11, pl. 1?3, 1951.

M.  Eguchi, ?Mesozoic hexacorals from Japan?, Science Reports of the Tôhoku Imperial University, Second Series (Geology), vol. 24, pp. 1?96, pl. 1?28, 1951.

J.  Alloiteau, ?Coralliaires. In: Collignon, M. (ed.). Le Crétacé supérieur d'Antonibe?, Annales Géologiques de Madagascar, vol. 19, pp. 80?83, 174, pl. 13, 1951.

J.  Alloiteau, ?Coralliaires. In: Collignon, M. (ed.). Faune Maestrichtienne de la c?te d'Ambatry (province de Betioky)?, Annales Géologiques de Madagascar, vol. 19, pp. 47?49, pl. 8, 1951.