Report on the Antipatharia collected by H.M.S. Challenger during the years 1873-1876 / by George Brook -- Supplementary report on the Alcyonaria collected by H.M.S. Challenger during the years 1873-1876 / by Th. Studer -- Report on the deep-sea Keratosa collected by H.M.S. Challenger during the years 1873-1876 / by Ernst Haeckel
Notes
Each plate accompanied by guard sheet with descriptive letterpress