Vertebrae, procoelous, definition, [19], [138];

acentrous, i.e. without a centre or body, [4];

amphicoelous, defined, [12];

of Urodela, [11];

gastrocentrous, defined, [282];

lepospondylous, [5];

defined, [78];

notocentrous, [4];

defined, [19];

opisthocoelous, defined, [12], [138];