REPTILES. 
295 
imbricated scales; tail with transverse folds, completely encir¬ 
cling it; toes widened in their whole length, or at the extremity 
only, having plicated or scaly skin. 
Sub-Genus I.— Platydactyli. —Toes widened throughout, 
and provided below with transverse scales. 
Sub-Genus II. — Hemidactyli. —Base of the toes with an 
oval disc, formed underneath by a double row of scales; the 
second phalange emanates from this disc, it is weak, and sup¬ 
ports the last, or nail joint; all the toes provided with nails; 
anal region with a row of spiracles on both sides; tail with large 
scales underneath. 
Sub-Getius III— Theckadactyli. —Toes expanded through 
their whole length, and provided with transverse scales, which 
are divided by a longitudinal groove; hallux without a nail; tail 
with small scales both above and below; destitute of femoral 
pores. 
Sub-Genus IV. — Ptyodactyli. — Toes divided at the point 
only; striated beneath ; nails hooked and placed in a fissure. 
Gecko caudiverbera. — The Scallop-Tailed Gecko. 
Plate LXXI. fig. ]. 
Dusky-black; back covered with distant red tubercles, each 
surrounded by a circle of small white scales; thighs and tail 
with similar tubercles without the surrounding scales; tail pro¬ 
vided with a scalloped fin-like membrane on each side, increas¬ 
ing as it approaches the tip, where it is broadest. Sixteen inches 
long. Inhabits Arabia. 
Sub.Genus V.— Phylluri. — Toes not widened; tail de¬ 
pressed and cordiform. 
TRIBE V.-CHAMELEON I DiE. 
Genus 23.—CHAMiELEON.— Cuvier. 
Generic Character. —Body compressed ; back carinated, en¬ 
tirely covered with papillose, shagreen-like scales ; tail round, 
