Great quantities of large, well-preserved saurian fossils new to science were found in the Grentzbitumenzone.
2
Some species still reportedly retain a visible ' tail ' although much atrophied from their supposedly extinct ' saurian ancestors.
3
The faunal aspect of the Tertiary periods differs strikingly from that of preceding Secondary or Mesozoic; in place of the great saurian reptiles we find the rapid development and finally the maximum expansion of mammals.