while in others it is so broad as to extend over the whole of the chest.
blue; and the naked space surrounding the eyes is usually of the same colour with the legs ;
in three species only is it crimson.
in this respect, even in the same species, according to the age of the individual: the general
distribution of the colouring of the bill seems, however, to be constant.
the size of the bird, the bill also varies with the age and sex of the individual, but seems to be
constant in each species in the adult state.

greater or less convexity of its sides; in the sharpness or roundness of its upper edge; and in

TANGER O}DIUT C/E OMG

The bill varies much in colour, and is subject to variation

the smoothness or jaggedness of its cutting edges.

A. The first section of the Toucans comprehends those in which the upper tail-coverts are

yellow.

crimson band by which it is separated behind from the black of the under surface is of small
breadth. All of them have the upper edge of the bill yellow, and a broad band of the same
colour surrounding its base, this band being separated by a narrow line of black from the
adjoining parts of the head and face.

1. Ramph. culminatus; with the mandibles compressed laterally and wholly black, except

2. Ramph. Cuvier; with the bill more attenuated than in czlminatus, the mandibles

3. Ramph. erythrorhynchus ; with the entire bill red, except the yellow culmen and basal

B. In the second section of the Toucans but one species is comprehended. It is characterized
either by the total absence of the scarlet pectoral band, or by having it so faint as to be scarcely
perceptible. The upper tail-coverts are white, exceed the ordinary proportions, and equal in
length about one half of that of the tail-feathers. The throat is white ; the space surrounding
the eyes is red, and the eyelids blue.

4. Ramph. Toco; with the bill rich orange, banded at its base and broadly blotched at its

 

In the whole of these the throat is white, with a faint tinge only of yellow; and the

This section comprehends three species :

the culminal and basal bands, which are pale straw yellow.

convex and blackish brown, except the greenish yellow culmen and basal belt of

the same colour, which is bounded before by a broad, and behind by a narrow,

band of black.

band, and the black borders of the basal band and cutting margins.

tip with black.

Such are the characters of

C. The third section of the Toucans comprehends two species, distinguished by the upper

 

The legs are of a slaty

In its proportion to

It also differs, according to the species, in the