Photo by W. Saville-Kent, F.Z.S.] [Milford-on-Sea.

BAR-TAILED FLAT-HEAD.

A shallow-water fish.

Photo by W. Saville-Kent, F.Z.S.] [Milford-on-Sea.

ROCK FLAT-HEAD.

About forty species of flat-heads are known.

Close allies of the Gurnards are the Flying-gurnards, which, by reason of the extreme development of the breast-fins, are enabled to take flying leaps out of the water. One species is common in the Mediterranean. The flying-gurnard is not to be mistaken for the true "flying-fish," or flying-herring, described later.

The curious mail-clad Armed Bull-head, or Pogge, commonly taken in shrimp-nets, is an ally of the flying-gurnard.