IX 



Preliminary Report to Professor Wyville Thomson, F.R.S., Director of the 

 Civilian Scientific Staff, on the true Corals dredged by H.M.S. * Chal- 

 lenger ' in deep water between the dates Dec. 30th, 1870, and August 

 31st ; 1875. By H. N. Moseley, Naturalist to the Expedition 544 



Preliminary Report to Professor Wyville Thomson, F.R.S., Director of the 

 Civilian Scientific Staff, on Observations made during the earlier part of 

 the Voyage of H.M.S. ' Challenger.' _ By the late Dr. Rudolf von Wille- 

 m6es-Suhm ; Naturalist to the Expedition 539 



Preliminary Report to Professor Wyvi]le Thomson, F.R.S., Director of the 

 Civilian Scientific Staff, on Crustacea observed during the Cruise of 

 H.M.S. ' Challenger ' in the Southern Sea. By the late Dr. Rudolf von 

 Willemoes-Suhni, Naturalist to the Expedition 535 



Preliminary Report to Professor Wyville Thomson, F.R.S., Director of the 

 Civilian 'Scientific Staff, on Work (Chemical and Geological) done on 

 board H.M.S. ' Challenger. 5 By J. Y. Buchanan, Chemist and Physicist 

 to the Expedition 593 



Report to the Hydrographer of the Admiralty on the Voyage of the ' Chal- 

 lenger ' from the Falkland Islands to Monte Video, and a Position in lat. 

 32° 24' S., long. 13° 5' W. By Prof. Wyville Thomson, F.R.S., Director 

 of the Civilian Scientific Staff on board. (Plates 25-33.) 623 



Index 63^ 



Obituary Notices of Fellows deceased : — 



Sir William Edmond Logan i 



Daniel Hanbury ii 



Gustav Rose iii 



Christopher Hansteen v 



Charles Eugene Delaunay . vii 



Thomas Hewitt Key x 



Sir Charles Wheatstone , xvi 



Justus Liebig xxvii 



Auguste Arthur de la Rive xxxvii 



ILLUSTRATIONS. 



Plates 1 and 2 illustrating Prof. W. G. Adams's Paper on the Forms of Equi- 

 potential Curves and Surfaces and on Lines of Flow. 



Plates 3-7 illustrating Prof. W. Thomson's Report on the Cruise of H.M.S. 

 ' Challenger ' from June to August 1875. 



Plates" 8 and 9 illustrating Dr. W. B. Carpenter's Paper on the Structure, 

 Physiology, and Development of Antedon rosaceus. 



vol. xxiv. i> 



