Two species of echinoids are identified from the La Meseta Formation (Eocene) of Seymour Island, Antarctic Peninsula, Antarctica. The occurrence of Stigmatopygus d’Orbigny in subunits Telm 5 and 7 extends its range upward from the Upper Cretaceous to the upper Eocene and represents the first recorded occurrence of the genus in Antarctica. The presence of Abatus Troschel in subunits 2, 5, and 7 are its first fossil records. The genus is currently found living off the coast of Antarctica. Both genera are known to be shallow-water dwellers. Abatus kieri n. sp. is described herein.