of Pythonomorpha, [488];

of Lacertilia, [494];

of Geckones, [503];

of Snakes, [582]

Vertebral column, instance of greatest shortening, [144];

of Urodela, [11], [13];

of Stegocephali, [78];

of Anura, [18] f., [21], [22];

Palaeobatrachus, [22];

Pipa, [22], [143];