Source : Webster's Revised Unabridged Dictionary (1913)

Paleichthyes \Pa`le*ich"thy*es\, n. pl. [NL. See {Paleo-}, and
   {Ichthyology}.] (Zo["o]l.)
   A comprehensive division of fishes which includes the
   elasmobranchs and ganoids. [Written also {Pal[ae]ichthyes}.]