46 
ROOM X. 
Nat. Hist. 
cal, with small square scales, and only two short feeble 
legs, in the front of the body. The Double Headed 
Snakes (. Amphisbcsnce ) differ from the Bimanae in merely 
having no legs. The anterior and posterior extremi¬ 
ties are equally blunt, and somewhat similar, which has 
led people to imagine, that they walk both backwards 
and forwards with the same facility—whence their 
name. 
Those ophisaurian reptiles which are destitute of any 
impressed lateral line, have been divided into several 
groups, as the True Seines ( Scincus ), having four legs, 
with small margined toes, and a sharp edged muzzle, 
which enable them to bury themselves with facility in 
the sand of the deserts they inhabit. 
Others have blunt noses, thin smooth scales, and long 
conical tails ; as the New Holland Tiliqua (. Lacerta 
scincoides) ; the Ribbon Galley-Wasp {Lac. tceniolata) 
from New Holland,— but one of the New Holland kind 
(Trachydosaurus rugosus), has large rugose bony 
scales, and a short depressed tail. 
Some of the Seines ( Lygosoma ) have very long slen¬ 
der bodies, and very small, weak feet; as the short 
footed Lygosoma (Scincus brachypus), and the dotted 
Lygosoma (L. punctatum). 
One of these Lizards, with nearly the same form of 
body, has only three toes to each foot ( Seps ); as the 
common Seps ( Seps chalcides ) from the South of Eu¬ 
rope : one of them differs by the ears being hid under 
the skin, as the Lacertine Siaphos ( Siaphos (squalls). 
The Bipes are peculiar for having only two oblong 
lobes in place of legs. One of the species, the Brazi¬ 
lian Bipes ( Pygopus cariococca) from Brazil, has the 
tympanum hid under the skin, whilst in the New Hol¬ 
land species (Delma), Fraser’s Bipes ( Bipes Fraseri ), 
the ears are as distinct as in the Seines. 
The Blind-worms (Anguis) have scales like the 
Seines, but they are without legs, and have only the ru¬ 
diments of them placed beneath the skin. 
Cases 6—13 contain the serpents ( Ophidii ), animals 
characterized 
