EMYDOSAURIANS. 129 
II.—Having the back high, and compressed belly and sides, with 
a toothed crest ; including the Side-crested Chameleon, C. daterales, 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 (lig. 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. 
senegalensis, 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. rhznocero- 
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. tuberculiferus, 
a native of South Africa; C. cucul/atus, the Hooded Chameleon, a 
native of Madagascar; C. masutus, having the chin simple, and the 
muzzle compressed, and C. dzfurcus, having the muzzle in the male 
forked—both natives of Madagascar; C. Zigris, Seychelle Islands ; 
C. ventralis, from South Africa, and C. pumzlus, from the Cape of 
Good Hope. 
V.—Having back and belly without crest ; including C. Parsonit, 
a native of Madagascar; and C. Owezz, the ‘Three-horned Chameleon, 
from Fernando Po, and C. Brookestanus, 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 
dony 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.— Crocodilide, having the lower canines fitting into a notch. in 
the edge of the upper jaw. 
Il.—Adiigatoride, having the canines fitting into a pit in the ° 
_ upper jaw. |] 
F 
