342 
ON THE CLASSIFICATION OP BIRDS. 
CIRCLE OF THE ORDER INSESSORES, or Perckers. 
1. 
Typical 
Circle. 
j. 
Typical 
Circle. 
Circle. 
... oin/iiur «nu more compressed, with a 
distinct tooth-like notch; mouth gene- 
rally defended by bristles. Insectivorous. 
pm entire ; feet very short, not adapted 
for walking ; position of the toes va- 
^ I nous. 
Aberrant l. Feet formed tor climbinu. 
. <> T^,.. . .. . " 
rious. 
Circle. 
■ J Tenuirotirtt. 
^^Figgiroatm. 
torial. 
13 . Bill broad at the base. Feeduponl 
L the wing. j- 
This table is drawn up in conformity with our second 
proposition — already so fully explained * — that the 
primary divisions of every circular group are five, an. 
parently ; but three, actually. In the present instance, 
more than perhaps in any other, this union of the three 
aberrant groups is demonstrated by the genus Prionites 
in the Fissirostres, and the RamphaMidfe in the Scan- 
sores ; the details of which will be given in their pro- 
per place. ^ 
(282.) The leading groups of the Insessores have 
been so repeatedly and so fully demonstrated as repre- 
sentatives of tlie primary orders of birds, by some of 
our best naturalists, that very little need be said upon 
the subject ; the nature of our present volume, how- 
ever, requires that it should not be passed over in 
silence, although the analogy, under a different form 
has been illustrated in a prior treatise. We shall on 
this occasion, place the tribes of the Insessores in one 
column, and the orders of birds in another • when it 
will be perceived that the analogical characters’ are mu- 
tually descriptive of some of the leading distinctions of 
each.? • 
* Classification of Animals, pp. ^26 ooq 
flbid. p. 231 . ..y. 
