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



CHAPTER XX. 



PAGE 



Valparaiso to Cape Tres Montes — The Cirripedia and Pycnogonida — Through the Messier 

 Channel, Sarmiento Channel, and the Strait of Magellan to the Falkland Islands — The Isopo'da — 

 The Falkland Islands — Fossils — The Scaphopoda and Gasteropoda — The Anomura, . . 849-901 



CHAPTER XXI. 



Falkland Islands to Monte Video — The Deep-Sea Fishes — Monte Video — The Gephyrea — 

 Monte Video to Ascension — Description of the Deposits — On Deep-Sea Deposits in. General — 

 Ascension — Ascension to Porto Praya — Pelagic Diatoms — Infusoria — Pyrocystis — Coccospheres 

 and Rhahdospheres — Bathybius — Cape Verde Islands to England — Synoptical Table of the 

 Voyage — The Botany of the Expedition — Challenger Collections and Publications, . . 902-947 



CHAPTER XXII. 



Density of Sea Water — Composition of Ocean Water Salts — Geographical and Bathymetrical 

 Distribution of Specific Gravity — Carbonic Acid, Nitrogen, and Oxygen in Sea Water — Discussion 

 of Meteorological Observations as bearing on Oceanic Circulation, ..... 948-1003 



APPENDICES. 



Appendix 



I. Explanation of Symbols and Abbreviations used in the Charts and Diagrams, . . 1005 



II. Revised Table showing the positions of the Soundings obtained by H.M.S. Challenger, the 

 Temperature and Specific Gravity of the Surface and Bottom Water, and the Stations 

 where Serial Temperatures, Trawlings, and Dredgings were procured, . . . 1007-1015 



III. Report on the Chronometers supplied to, and the Meridian Distances obtained by H.M.S. 



Challenger, between the 1st December 1872 and the 12th June 1876, by Staff-Commander 



T. H. Tizard, R.N. ......... 1017-1026 



IV. Report on the Health of the Crew of H.M.S. Challenger, during the years 1873-76. By 



Fleet-Surgeon George Maclean, R.N. ....... 1027-1031 



V. Chemical Analyses, . . . . . . . . .1033-1051 



VI. Bibliography, giving the Titles of Books, Reports, and Memoirs referring to the Results of 



the Challenger Expedition, ........ 1053-1063 



VII. List of Reports on the Scientific Results of the Expedition, .... 1065-1072 



VIII. Letters addressed by the Admiralty to the Captain of H.M.S. Challenger, and the Director 



of the Civilian Scientific Staff, after the Arrival of the Expedition in England, . . 1073 



Index, ............ 1075-1110 



