4 aff 
SCANSORES. — PRIMARY DIVISIONS. 129 
‘men, we believe, is in Europe, appears to be rather 
arger than a thrush; some of the touraccos, forming 
the genus Corythaix, are not larger than a magpie, and 
are fully equal to some of the small hornbills ; while 
C. gigantea, the last of the group, is not inferior to 
the middle-sized Buceride. The Buceros galeatus, al~ 
ready mentioned, is probably a distinct type in its own 
family; and seems to be that which, both in form and 
habits, — for it is described as entirely frugivorous, 
— completes the union of the two families. 
CHAP. IX. 
ON THE TRIBE OF SCANSORES, OR CLIMBING BIRDS. 
(143.) We now enter upon the Scansorian Onr- 
DER, comprising all those families whose feet are 
more particularly organised for climbing trees; and 
whose different modifications of structure have been 
already so fully explained.* These members, — ex- 
cepting in the genus which unites the Scansores with 
the Rasores,— are particularly short, for they are 
never used to walk upon the ground. ' With the excep- 
tion of one family, the whole have the toes placed in 
pairs, — that is, there are two before and two behind, 
-—a peculiarity which renders them of easy determin- 
ation, notwithstanding the many and striking variations 
in the form of the bill and wings. The whole of these 
birds are naturally arranged in the following primary 
divisions or subfamilies: —1. The Crerruiaps, or 
creepers ; — 2. The Picip#, or woodpeckers ; — 3. The 
Psirracip#, or parrots; —4. The Rampuasrips#, or 
toucans ; and, lastly, the Cucunipa, or cuckows. 
These families, collectively, form a complete circle ; the 
* Vol. L p. 133. 
VOL. Ii. K 
