XU THE VOYAGE OF H.M.S. CHALLENGER. 



title ; and when the work is complete a collation and a new set of titles will 

 be issued, with directions for rebinding the Memoirs in zoological sequence. 



The second volume, which will appear immediately, will contain the 

 description of the Birds, by Dx P. Lutley Sclater, F.R.S., with the assistance 

 of the late Marquis of Tweeddale, F.R.S., Dr 0. Finsch, C.M.Z.S., Professor 

 Salvadori, C.M.Z.S., W. A. Forbes, F.Z.S., Osbert Salvin, F.R.S., Howard 

 Saunders, F.R.S., and the late Professor Garrod, F.R.S. ; and the account of 

 certain Corals belonging to the groups Hydrocorallin^, Helioporid^, and 

 Madreporaria by H. N. Moseley, M.A., F.R.S., Fellow of Exeter College, 

 Oxford, and one of the Civilian Staff attached to the expedition. 



The third and the fourth volumes, which will be issued before the end of 

 the year, will probably contain Memoirs on the Echinidea by Professor 

 Alexander Agassiz ; on the Deep-Sea Medusae by Professor Haeckel ; on the 

 Pantopoda by Dr P. P. C. Hoek ; on the Ophiuridea by Theodore Lyman ; 

 and on the Deep-Sea Fishes by Dr Giinther, F.R.S. . 



Reports on the Foraminifera by Henry B. Brady, F.R.S. ; on the 

 Radiolaria by Professor Ernst Haeckel ; on the Hexactinellid Sponges by 

 myself, with the anatomical details of the soft parts by Professor Franz 

 Eilhart Schulze of Graz; on the Stalked Crinoids by myself; on the Holo- 

 THURiDEA by Dr Hjalmar Theel of Upsala; on the Annelida by Dr W. C. 

 MTntosh, F.R.S. ; on the Polyzoa by George Busk, F.R.S. ; on the 

 TuNiCATA by W. A. Herdman, D.Sc. ; on the Cephalopoda by Professor 

 Huxley, F.R.S.; on the Macrura by C. Spence Bate, F.R.S.; and on 

 the. Anatomy of Penguins by Professor Morrison Watson, F.R.S.E., are well 

 advanced; and Memoirs on the Diatomace^ by Count Castracane; on some of 

 the Foraminifera by Dr W. B. Carpenter, C.B., F.R.S. ; on the Alcyonaria 

 by Professor Perceval Wright, M.D. ; on the Free Crinoids by P. Herbert 



