LACERTILIA. 621 
movable eyelids and external ear-openings. The teeth 
are fused to the edge or to the ridge of the jaws, never 
planted in sockets. The tongue, broad and short in some, 
e.g. Geckos and Iguanas, long and terminally clubbed 
in Chameleons, is oftenest a narrow bifid organ of touch. 
9 10 “ 
Fic. 339.—Lateral view of brain of Hatteria punctata, 
—After Osawa. 
1-12, Cranial nerves; 4.¢., parietal eye; 4.g., pineal gland ; 0., 0 tic 
lobe 5 Coy cerebellum; v., fourth ventricle 3 z., infundibulum 
and pituitary body. 
The opening of the cloaca ts transverse. There ts a urinary 
bladder, corresponding to that of the frog, and a double pents. 
Most ave oviparous, but in a few the eggs are hatched within 
the body. They are usually active, agile animals, beautifully 
and often protec- - 
tively coloured. 
The tail is readily 
thrown off by a 
veflex action ; lost 
tails and even legs 
may be regenerated. z 
The food generally Fic. 340.—Hatteria or Sphenodon.— After 
consists of insects, Hayek. 
worms, and other small animals, but some prey upon larger 
animals, and others are vegetarian. Most are terrestrial, 
some arboreal, a few semi-aguatic, and there ts one marine 
form. Lizards are most abundant in the tropus, and are 
absent from very cold regions. 
