75 
ventral fins placed on the hinder part of the room xi. 
body. 
The Gurnards ( Trigla ) are separated from 
the other Percoid Fish, by the bones of the 
face being very large, so as to cover the cheeks. 
Some of these have the pectoral fins so large, 
that the fish can support themselves some time 
in the air, and are therefore called Flying Gur¬ 
nards ( Dactyloptera ). 
The Scienoid and the Sparoid Fish differ 
from the Perches, in the palate being without 
teeth. Some of these, as the Sargi ( Sargus ), 
have large teeth on the side of the jaw. 
The Maenoid Fish differ from those of the 
two former families, by the jaws being pro¬ 
tractile. 
The Chaetodons are known at once by their 
compressed form and by their dorsal, and often 
their other fins being covered with scales like 
the rest of the body. The teeth are usually 
very small and numerous, like bristles, from 
whence the name. The common Chaetodons 
( Chcetodon ) have their opercular bones finely 
ciliated, while the Horny Chaetodons have the 
lower part of the operculum ending in a large 
spine. These fish are very numerous on the 
rocky shores of the seas of warm climates. 
They are generally beautifully and variously 
coloured, and good for food. Many are re¬ 
jected from prejudice, though the Sea Bream 
( Brama ) 
