140 



SAURIANS. 



Tigris, Seychille Islands ; C. ventralis, from South. Africa, and 

 C. pumilus, from the Cape of Good Hope. 



Y. Having back and belly without crest ; including C. Par- 



F 



Fig. 32. Chameleo vulgaris. 



sonii, a native of Madagascar ; and C. Owenii, the Three-horned 

 Chameleon, from Fernando Po, and C. Brookesianus, an adult 

 species, from S. W. Brookes's collection. 



EMYDOSAURIANS 



Have the head large, covered with a thick skin, ears closed with 

 two valves, gape very wide, tongue short, jaws with a single series 

 of cone-shaped teeth inserted in sockets ; back with a hard disc 

 formed of a longitudinal series of square keeled plates of hard 

 bony consistence embedded in the skin ; the under surface covered 

 with smooth thin square plates ; legs short, feet webbed, with 

 four to five toes, the three inner toes of each foot only armed with 

 claws. 



They are divided into two groups : 



I. Crocodilidce, having the lower canines fitting into a notch 

 in the edge of the upper jaw. 



II. Alligatorida, having the canines fitting into a pit in the 

 upper jaw.] 



