Oeidolampas ataxensis (Cotteau, 1889). Middle Eocene,
Haut de la Combe, France. From G. Cotteau. 1889-1894.
Paleontologie francaise. Terrain tertiaire. II. Echinides
eocenes. Paris, G. Mason. 789 pp., pls 201-384 (plate 226, fig.
2). Apical view.