L. F.  de Pourtalès, ?Deep-sea corals?, Illustrated Catalogue of the Museum of Comparative Zoölogy, vol. 4, pp. 1?93, pl. 1?8, 1871.

L. F.  de Pourtalès, ?Zoölogical results of the Hassler expedition: Deep-sea corals?, Illustrated Catalogue of the Museum of Comparative Zoölogy, vol. 8, pp. 33?49, 1874.