246 
FORK-TAILED GAPER. 
colour is bright but dark crimson, while the belly 
and under tail-covers are the same ; the wings are 
lengthened and reach to half the length of the tail, 
the latter being slightly forked ; the thighs are 
black, and the hill and feet blackish-brown. 
Total length, about 7 inches ; bill, gape, 1 ; 
front, t 7 5 ; wings, 3J ; tail beyond, 1 ^ ; depth of 
the fork, ; tarsus, |. 
W e have now described the last type of form, which, 
to establish the circularity of the Eurylaiminas, should 
not only represent one of the primary types of Nature, 
but also show a disposition to unite with Cyrnbir- 
hynchus, which was our first type. Now this is a 
demonstration which can very rarely be made good 
where the species, as in the present instance, are 
very few. But here, again, we hope to deter- 
mine not only the primary types of the Eurylai- 
mince , hut of proving their circularity. The ge- 
nus Cymbirhynchus, it will be remembered, differs 
from all the others we have noticed in one very pe- 
culiar character, — the base of the bill being marked 
by a thickened rim. Now this is precisely one of 
the characters of the type before us ; and these two 
birds are the only instances in the group of the rictus 
being strongly bristled. If any other evidence was 
necessary to show this union, it may be drawn from 
the fact of M. Lesson having actually brought Cym- 
birhynchus and Platysiomus into one genus, distinct 
from the other Eurylaimince, which he names 
