CRUSTACEA.
CRABS--LOBSTERS.
How are they distinguished from the Insects?--Barnacles and
Acorn-shells.--Siphonostomata.--Entomostraca.--King-Crab.
--Edriophthalmia.--Sandhoppers.--Thoracostraca.--Compound
Eye of the higher Crustaceans.--Respiratory Apparatus of the
Decapods.--Digestive Organs.--Chelæ or Pincers.--Distribution
of Crabs.--Land Crabs.--The Calling Crab.--Modifications of
the Legs in different species.--The Pinna and Pinnotheres.
--Hermit Crabs.--The Lobster.--The Cocoa-nut Crab.--The Shrimp.
--Moulting Process.--Metamorphoses of Crabs.--Victims and
Enemies of the Crustaceans.--Their Fecundity.--Marine Spiders
and Insects 243