Chapter XX

THE GEOGRAPHICAL DISTRIBUTION OF MARINE LIFE.

The Dependence of all created Beings upon Space and Time.--The
Influences which regulate the Distribution of Marine Life.--The
four Bathymetrical Zones of Marine Life on the British Coasts,
according to the late Professor Edward Forbes of Edinburgh.
--Abyssal Animals.--_Bathybius Haeckelii._--Deep-Sea Sponges and
Shell-Fish.--Vivid Phosphorescence of Deep-Sea Animals.--Deep-Sea
Shark Fishery--The "Challenger." 405