Chapter 34 THE CROSSOPTERYGII

Class Teleostomi.-We may unite the remaining groups of fishes into a single class, for which the name Teleostomi (τ?λεο?, true; στ?μα, mouth), proposed by Bonaparte in 1838, may be retained. The fishes of this class are characterized by the presence of a suspensorium to the mandible, by the existence of membrane-bones (opercles, suborbitals, etc.)