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