Keywords: Medusae Plate 07.jpg en Pectanthis asteroides synonym of Ptychogastria asteroides From Report on Deep-sea Medusae dredged by H M S Challenger during the Years 1873-1876 1881-03-01 Challenger Expedition reports Ernst Haeckel PD-Challenger Report Uploaded with UploadWizard Report on the Deep-Sea Medusae Ptychogastria asteroides |