Schmidt, O. 1880. Die Spongien des Meerbusen von Mexico (Und des caraibischen Meeres). Heft II. Abtheilung II. Hexactinelliden. Abtheilung III. Tetractinelliden. Monactinelliden und Anhang. Nachträge zu Abtheilung I (Lithistiden): 33-90, pls V-X. <i>In</i>: <i>Reports on the dredging under the supervision of Alexander Agassiz, in the Gulf of Mexico, by the USCSS ‘Blake’</i>. (Gustav Fischer: Jena).