53 
fin-shaped crest down the back; the second, the 
Chamceleo'psis , from Mexico, has a compressed 
ridge on the back of the head, but only a slight 
dorsal crest. Both these have simple toes. The 
third, the Anolis , has a simple flat head, but 
the last joint but one of the toes is dilated on 
the sides into a pear-shaped disc, so as to enable 
these animals to walk on smooth and nearly 
perpendicular surfaces. Of this genus there 
are many species.—Lastly, the marbled Lizards 
[Polyclivus') have the ribs surrounding the ab¬ 
domen, like the Anolis, but their toes are not 
dilated, and they have no dorsal crest. 
In the lower part of this Case (No. 3.) are 
the Geckos. These are Nocturnal Lizards, of 
a dull, lurid appearance, with depressed heads, 
and large round eyes. Their body is usually 
covered with small scales, amongst which are 
frequently larger tubercles, and the under side 
of their toes is generally furnished with variously 
shaped imbricated scales, or folds of the skin, 
which enable the animal to crawl up glass and 
other smooth surfaces, and even to run with fa¬ 
cility, the back downwards, on the ceiling of a 
room, like a fly. They are found in all parts of 
the world, and are divided into many groupes, 
according to the form of their toes. Some of 
the most peculiar are, the Common Gecko 
(Gecko guttatus ), from India; the Chinese 
Gecko (Geclco Revesii), from China; and the 
Ornamented 
room x* 
