ORDER III. The THORACICI, have the belly-fins placed under the pectoral fins.—This order comprehends 19 genera, viz. Cepola, Echeneis, Coryphæna, Gobius, Cottus, Scorphæna, Zeus, Pleuronectes, Chætodon, Sparus, Scarus, Labrus, Sciaena, Perca, Gasterosteus, Scomber, Centrogastrus, Mullus, Trigla.