The functional and developmental relationship of the muscles, skull and dentition involved in mastication and feeding in four phyllostomatoid bats were studied. Dry weights of the muscles, weights of the mandibles, and skull measurements were taken. T . . .

This study included 12 families (157 specimens); 122 specimens represented fourteen species of Emballonuridae (Chiroptera). Four morphologically different sterna have evolved within the family Emballonuridae: 1) a three segment sternum: manubrium, mes . . .