45 
common Chameleon, the occiput is arched and com¬ 
pressed, whilst, in the Senegal species, it is flat; 
some of the species, as the Eared and Hooded Chame¬ 
leons, have the back part of the occiput furnished with 
two fleshy lobes; whilst the Panther and Cape Cha¬ 
meleon have the front of the chin furnished with fleshy 
processes. Others have the head armed with horns, 
which in some are placed over the eye-brow, as in 
Brooke’s Chameleon, and in others on the tip of the 
nose, as in the Two-horned Chameleon. 
Case 5 contains the Snake-Lizards ( Ophisauri ), rep¬ 
tiles which much resemble snakes in appearance, and 
are covered with regular and uniform scales. These 
are divided into two sections, according to the form of 
the scales on the sides, which in some ( Ptygopleura ) 
are small, making a fold which is dilated when the ani¬ 
mal has eaten a full meal; and in others the scales of 
the sides are similar to those on the body. 
The Zonuri ( Zonurus ) have four distinct, moderately 
long legs, and exposed ears. 
The African Lizards of this group are distinguished 
by their thighs being marked with a line of pores on 
the under side. In some of these, as the common Zo¬ 
nurus, the tail is furnished with armed scales, whilst in 
others, as the Common Cicigna, the caudal scales are 
unarmed. 
The American species, on the contrary, have no gland 
under the thighs, and the scales of their tail are not 
armed ; there are several species of this genus, as, Bur¬ 
nett’s Gerrhonotus ( Gerrhonotus Burnettii), and the 
Imbricated Gerrhonotus ( Gerrhonotus imbricatus). 
The Scheltopusiks ( Pseudopus ) have only rudiments 
of legs, in the form of undivided lobes, placed on the 
side of the vent; as in Durville’s Pseudopus ( Pseudo- 
pus Durvillii) :—The Glass Snakes ( Opisaurus ) are 
quite destitute of legs ; as the Common Glass Snake 
( Ophisaurus ventralis) : all the species of these genera 
have the tympanum of the ear exposed. 
The Bimanse ( Ckirotes ) of Mexico are subcylindri- 
cal, 
ROOM X 
Nat. Hist 
