The Geckos, which constitute this
group, are Lizards of small size, which inhabit the hotter parts
of both the Old and the New Worlds, and have always attracted
attention by their habit of running with exceeding swiftness
along the walls and ceilings of rooms. They are enabled
to maintain their hold under these circumstances, in part by
the sharpness of their curved, and, in some cases, retractile
claws; and, in part, by laminated expansions of the integument
of the under-surfaces of their digits, which appear to act
in somewhat the same fashion as the sucker of the Remora
The most important and distinctive characters of these
Their vertebrae are amphiccelous.
Neither the upper nor the lower temporal arcades are ossified,
the post-frontal being connected with the squamosal, and
the maxilla with the quadrate, by ligament.
The jugal is rudimentary, and the squamosal very small.
There are no eyelids, but the integument becomes transparent
as it is continued over the eyes. The integument is soft, or coriaceous, not scaly.