Chap. IX.] 
CEKATOPHORA. 
279 
than the extremity of this treacherous weapon is 
disclosed, broad and cuneiform, and covered with a 
viscid fluid ; and this, extended to its full length, is 
darted at its prey with an unerring aim, and redrawn 
within the jaws with a rapidity that renders the act 
almost invisible. 1 
Whilst the faculty of this creature to assume all the 
. colours of the rainbow has attracted the wonder of all 
ages, sufficient attention has hardly been given to the im- 
perfect sympathy which subsists between the two lobes 
of its brain, and the two sets of nerves that permeate the 
opposite sides of its frame. Hence, not only has each of 
the eyes an action quite independent of the other, but 
one side of its body appears to be sometimes asleep whilst 
the other is vigilant and active ; one will assume a green 
tinge whilst the opposite one is red ; and it is said that 
the chameleon is utterly unable to swim, from the in- 
capacity of the muscles of the two sides to act in concert. 
Oeratophora. — This which till lately was an unique 
lizard, known by only two specimens, one in the British 
Museum, and another in that of Leyden, was ascertained 
by Dr. Kelaart, about five years ago, to be a native of the 
higher Kandyan hills, where it is sometimes seen in the 
older trees in pursuit of insect larvae. The first speci- 
men brought to Europe was called Ceratophora Stod- 
dartii, after the name of its finder ; and the recent 
discovery of several others in the National Collection has 
enabled me, by the aid of Dr. A. Griinther, to add some 
important facts to their history. 
This lizard is remarkable for having no external 
ear; and it has acquired its generic name from the 
1 Prof. Eymbr Jones, art. Rejpt- toI. iv. pt. i. p. 292. 
ilia, in Todd's Cyclop, of Anat. 
T 4 
