EM YDOSA URIANt 



II. Having the back high, and compressed belly and sides, with 

 a toothed crest ; including the Side-crested Chameleon, CJateralis, a 

 native of Madagascar. 



III. The back and belly having a toothed crest, the sides simple, 

 the scales small and equal, muzzle simple ; including the Common 

 Chameleon, C. vulgaris (Hg. 31), with many synonyms. It is a 

 native of the East Indies, is the recognised type of the family, and 

 the one most commonly brought to England. There are probably 

 two varieties one from North Africa, which is also found in Sicily 

 and the south of Spain; the other, the East Indian variety, C. 

 stnegalensis , the Senegal Chameleon, a native of West Africa ; C. 

 arpelis, from Ashantee and Gaboon ; C. verrucosus, a native of 

 Bourbon and Madagascar ; the Rhinoceros Chameleon, C. rhino- 

 ceratus, also from Madagascar. 



IV. Having a toothed crest on the back, with the belly and 

 sides simple, the chin and muzzle simple ; including C. tuber culifer us, 

 a native of South Africa ; C. cucullatus, the Hooded Chameleon, a 

 native of Madagascar ; C. nasutus, having the chin simple, and the 

 muzzle compressed, and C. bifurcus, having the muzzle in the male 

 forked both natives of Madagascar ; C. Tigris, Seychelle Islands ; 

 C. ventralis, from South Africa, and C. pumilus, from the Cape of 

 Good Hope. 



V. Having back and belly without crest ; including C. Parsonii, 

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

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

 S. W. Brookes' 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. 



79 



