57 
Family ARDIAD&. 
- Sub-genus Cancropsacus. Briss. 
Cancrophagus gutturalis. Above a dark slate colour; throat 
white with a deep black-blue central line, widening as it 
descends ; middle of breast rusty white dashed with black- 
blue; belly pale rufous, with broad longitudinal slate 
coloured stripes; wings and tail of the same colour as back, 
only rather darker. Length 114 inches. Shot between the 
Black and Vaal Rivers—rare. 
Genus Carzo. Meyer. 
Carbo Africanoides. Head, back, and sides of neck, dull 
brown, clouded with black-green; interscapulars dark 
brown, margined with white; back, rump, and point of 
shoulders, black-green; wing coverts and scapulars hoary 
blue-grey, tipt with white, and crossed near extremities by a 
black bar, some of them also finely margined with black; 
throat, breast, and belly, dull white, the first clouded with 
brown ; sides of breast, flanks, thighs, and under tail coverts, 
green-black; quills greenish brown; tail greenish black. 
Length 20 inches. Shot near New Latakoo. 
This may perhaps prove to be the Pelecanus Africanus, at a certain 
age. 
Note.—The names given by the Natives to the objects above 
described, I have adopted as the trivial ones, whenever they 
would readily admit of such application, under an idea that 
they are not so calculated to confuse and mislead as those 
formed with a view to indicate certain assumed peculiarities 
in the individual objects. In the proportion in which we are 
enabled to extend the number of species, in the same propor- 
tion do we find the appearances which at one stage of the 
science were considered peculiar to one species to be common to 
many, therefore until some form of nomenclature be invented, 
which is not calculated to confuse and mislead by suggesting 
some such character or appearance in an object, it would per- 
haps be better to avoid, as much as possible, any reference to 
suchinthename. Every Naturalist must have found the diffi- 
culty of discovering suitable names for species, and yet no one 
has endeavoured to devise a system of nomenclature, which 
could be carried to any extent without difficulty, and be free 
from ambiguity. 
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