_Fish "Lavidian."_--In some ancient acts of parliament mention is made of a
fish called "lavidian," and from the regulations made concerning it, it
appears to have been of such small size as to be capable of being caught in
the meshes of an ordinary net. But I cannot find that this name is
contained in any of the books of natural history, written by such authors
as Gesner or Rondeletius. Is it at this time a common name anywhere? Or can
any of your readers assist in determining the species?