CONTENTS. 



of Conferva in the China Sea— Its Range— Cases of Red Discolora- 

 tion — Microscopic Characters of Sea Dust — Oscillatoria — Observa- 

 tions of Former Voyagers— Horizontal Rainbow— Development and 

 Peculiarities — Changing Aspect of the Sea— Natural Colour of the 

 Deep Sea — Changes in Shallow Water— By Rough Weather- 

 Father Secohi's Spectroscopic Observations 373 



CHAPTER XXIII. 



THE LUMINOSITY OF THE SEA. 



Nature of the Phenomenon — Phosphorescence a Misnomer— Classification 

 of Luminous Phenomena — Sparks always visible — Their Cause — 

 Luminous Sheath to Ship — Singapore Harbour — Simon's Bay — 

 Noctilucae — Scene on the Chinese Coast — Moon-shaped Patches of 

 Light — Not caused by Medusae — Often spontaneous — Probably 

 Pyrosomas — Recurrent Flashes — Colour and Appearance sponta- 

 neous — Depth of the Animals — Examples of Recurrence — Milky 

 Sea — Its Rarity — -Conditions of Lumiuosity— Non-luminous Animals 

 — Rationale of Luminosity — A Correlative of some other Force — 

 Contractility — Luminous Envelopes — ^Range of Luminosity among 

 Animals 391 



CHAPTER XXIV. 



THE VOYAGE HOME. 



Storm at Hong Kong — Loss of the " Osprey ' — Sea-birds at the Cape — 

 Simon's Bay — Cormorants — Botany of the Cape — Physical Features 

 of False Bay — Cape Town — Marine Animals of Simon's Bay — 

 Coast of St. Helena — James' Town — Napoleon's Tomb — Ascension — 

 General Features — Craters — Vegetation — Insects — " Wide-awake 

 Fair" — Boldness of the Birds — Turtle Ponds — Varieties of Turtle — 

 Western Isles— Pico — Fayal — Villa de Horta — Character of Vegeta- 

 tion — Spithead — Conclusion . .410 



APPENDIX. 



Sau-o Vocabulary — Dialect of Ke-lung 434 



