106 



HIGH SCHOOL ZOOLOGY. 



12. Finally the Testudinidse embrace tlie truly terrestrial tortoises 

 lepresciited by one species iu the iSouthern States, but occurring ubuud- 

 autly in the warmer parts of the Old and New Worlds. (l*'ig. 75). 



13. The genus Hatteria (Fig. 76), refei-red to above is most 

 nearly related in its habits and form to the Lizards, Lacertilia, 

 but there are some respects in which its structure is mucli 

 more primitive ; e.g., its vertebrae are ampliicoelous and its 

 pineal body (I. 36), presents more nearly the structure of an 

 eye than does that of any other living reptile. Unlike tlie 

 Lizards its quadrate bone is united firmly with the skull, and 

 by an arch below the eye with the maxilla. 



Fig. 76.— Hatteria ptinctata. J. 

 (After Brehni). 



14. In spite of tlie difference in habit between the extreme 

 forms of the Chelonian series, there is not so much difference in 

 external appearance as we meet with in the second order — the 

 Lacertilia. A few aquatic forms belonging to the Varanidas, 



