Crossword-Solution: SAURIA 6 letters, 4 clues 🏆 scrabble score: 6

Thus, three of Cuvier’s four orders of reptilia (_sauria_, _chelonia_, and _batrachia_) are represented in this formation, the serpent order (_ophidia_) being alone wanting.

For if we find the first real bones of birds only in the Jura and in the Chalk-formation, they are birds with tail-spines and with teeth in the beak--hence still related to the reptilia or the sauria.

Other groups which once played a great _rôle_, are now wholly extinct; for instance, the trilobites of the primary, the sauria of the secondary, the nummulites of the tertiary periods.

The flying sauria, if not in their organs of flying, which remind us more of the bat, at least in head, neck, and toes, are closely connected with the {83} birds--the oldest birds of the Jura and chalk formations, with their tail-spines similar to the reptilia and their teeth in the beak to the sauria.

The meridian altitude of the _fifth day_ has to be looked for where ocean-life, with its sauria and innumerable animals, gave its impress to organic life on earth, and the air was filled with inhabitants: geology calls such a time the _secondary period_ of trias, Iura, and chalk.