CONTENTS. 



I. — Report on the Antipatharia collected by H.M.S. Challenger during the 



years 1873-1876. 



By George Brook, F.L.S., F.R.S.E. 



(The Manuscript was received in Instalments between 29th December 1888 



and 22nd July 1889.) 



II. — Supplementary Report on the Alcyonaria collected by H.M.S. Challenger 



during the years 1873-1876. 



By Professor Th. Studer, M.D. 



( The Manuscript loas received 28th December 1888 and 1st March 18S9.) 



III. — Report on the Deep-Sea Keratosa collected by H.M.S. Challenger during 



the years 1873-1876. 



By Professor Ernst Haeckel, M.D., Ph.D., Hon. F.R.S.E. 



(TJie Manuscript ivas received I4th March 1889.) 



