Source : Webster's Revised Unabridged Dictionary (1913)

Murex \Mu"rex\, n.; pl. {Murices}. [L., the purple fish.]
   (Zo["o]l.)
   A genus of marine gastropods, having rough, and frequently
   spinose, shells, which are often highly colored inside; the
   rock shells. They abound in tropical seas.

Source : WordNet®

murices
     See {murex}