196 MR. J. G. GOODCHILD ON THE + [Apr. 6; 
these feathers that is characteristic of a large number of the birds 
remaining to be described. 
Still following the plan of tracing out the various modifications 
of wing-pattern without reference to any other characteristics, however 
important, the place of the Coccyges should be somewhere near the 
confines of the Columbe. 
Carpococcyx. Cuculus. Coecystes. 
In passing in review a number of species belonging to the Coceyges, 
they seem to be naturally divisible into the Cuckoos proper, well 
represented by Cuculus canorus (fig. 19), and the Centropodine, 
represented by Carpococcyx radiatus (fig. 20). The Cuckoos proper 
somewhat resemble the Pigeons, and where they differ from the 
Pigeons they seem to approach the Picarian birds. The Ground 
Cuckoos seem to make some approach to the Peristeropods; in 
other respects they remind one of the Musophagide. Judging from 
stuffed specimens alone, the wing of Opisthocomus closely resembles 
that of the Cuckoos. 
In the living Rustards, so far as I can judge, there seems again to 
be another variation on the general pattern of the Columbe ; but I 
have hitherto failed to obtain a satisfactory sketch of the wing-pattern 
in this bird. Ofthe remaining families of the Order Alectorides given 
in the List, I have also, so far, failed to obtain any good evidence, 
except in the case of the Gruidee, which will be referred to in more 
detail presently. It is especially desirable to obtain good observations 
upon the point specially under notice in the case of the Cariamas ; 
but the lax texture of their wing-feathers renders any such observation 
a matter of considerable difficulty. So far as I can judge at present, 
the style of coverts in the Cariamas agrees with that of the Bustards, 
and differs frem that of Serpentarius. 
The specimens of Chauna chavaria living at the Gardens present a 
style of imbrication that seems to approach the Columbine type 
very closely. The disposition shown in fig. 21 is practically the 
same as Wolf has drawn in Ch. nigricollis (=derbiana), P. Z.S. 1864, 
pl. xi. Whether the feathers of the distal tract of the cubital 
region follow exactly the same disposition as do those of the Pigeons 
