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

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