( V ) 



Family CHELONIDiE. 

 Feet fin-shaped. Inhabit the sea only. 



Caouna. 

 Five pairs of costal shields. 

 Colour mottled reddish brown ... C. olivacea. 



Chelonia. 

 Four pairs of costal shields. 

 Colour mottled reddish brown ... C. virgata. 



Caretta. 

 Head elongate. Plates imbricate. 

 Nose beaked, hawk-like ... C. squamata. 



Dermatochelys. 

 Shell coriaceous. 

 Shell-ribbed. No plates . . . D. coriacea. 



Order SAURIA. 

 A. — Aquatic Saurians. Vent longitudinal. 



Family GROCODILID^. 

 Back protected by osseous scutes. 



Crocodilus. 

 The fourth tooth of the mandible fitting into a notch in the 



upper jaw. 

 Nuchal shields none. Dorsal shields broad.. C. Pondiclierianus. 

 Nuchal shields none. Dorsal shield normal. C porosus. 

 Nuchal shields four ... C. palustris. 



Garialis. 

 Snout elongate. Nose humped in males. 

 Muzzle elongate, slender ... G. Gangeticus. 



B, — Land Saurians. Vent transverse. 



Family VARANID^. 

 Lizards of large size, with compressed teeth. Tongue elongate, 

 slender, forked. Scales non-imbricate, rounded, sub-equal. 

 Limbs and claws strong. Habits diurnal. Food animal and 

 carrion. 



