Verrill, A. E. (1885). Results of the explorations made by the Steamer Albatross off the northern coast of the United States, in 1883. Annual Report of the United States Commission of Fish and Fisheries, Washington. 11, 503-699, plates 1-43 (begin p.604).
World Polychaeta Database (WPolyDb) A discursive voyage report with preliminary notes on taxa (no species descriptions as such) plus some plates. Annelida see p.524 NeMys doc_id: 3192 Descriptor: Cladocarpus flexilis