BioStor
 | Report on the Hydroida collected during the expeditions of H. M. S. Porcupine (1874) Transactions of The Zoological Society 8: 469-481 |
 | Hydropolypen von Rovigno, nebst Uebersicht uber das System der Hydropolypen im Allgemeinen (1898) Zoologische Jahrbuecher (Systematik) 10: 472-555 |