Siphonidium geminum (Schmidt, 1879)

Schmidt, O. 1879. Die Spongien des Meerbusen von Mexico (Und des caraibischen Meeres). Abtheilung I. Heft I. Pp. 1-32, pls I-IV. In:Reports on the dredging under the supervision of Alexander Agassiz, in the Gulf of Mexico, by the USCSS ‘Blake’. (Gu