10 POTAMITES. 



5. The eyes are prominent, near each other, and are directed forwards and a Httle 



upwards. 



6. The jaws are strong, with their cutting margins nearly naked, being covered 

 externally only by a thick revolute fold of skin resembling lips. 



7. The neck is very long and retractile. 



8. The extremities are very short, thick, and depressed; there are five fingers and 



as many toes, but only three nails to each extremity, and these are nearly 

 straight and slightly grooved below. 



