And the crocodiles, with the Hatteria, were united with chelonians.
The most distinct of the traces of chelonians are on the large slab lately obtained for me by President Hitchcock from Greenfield.
On the same surface are impressions of nails, which may have belonged to birds or chelonians.
This may occur while the stomach still retains its primitive tubular form, as in most chelonians (Fig. 60).
In lacertilians and in some chelonians a lateral offshoot of the pancreas is directed transversely and is adherent to the spleen.
In Chelonians, the turtle and tortoise group, the characters of the carpus vary with the family.
Thirty of these are believed to be those of birds, four of lizards, two of chelonians, and six of batrachians.
Chelonians were abundant within the British area during the older epoch.
In Chelonians the surface of the skull is continuous without movable articulations.
Most chelonians may exist for a very long time without breathing, and can stay for hours or even days under water.