Pet a ie 
106 ON THE CLASSIFICATION or DS. 
both, as a whole, have the upper mandiblerniioael urv 
and deeper notched than any other. It is only amon 
the Glaucopine and the Scaphidurine that we find that — 
unusual developement of tail so characteristic of rasorial — 
types. The Crypsirina temnura in one group, and 
whole of the typical boat-tails in the other, verify these — 
to be rasorial types, and consequently analogous. It is — 
at these points that the circles of the crows and the 
starlings touch and pass into other; and we thus find — 
that it is here the two groups evince the closest affinity : 
a singular circumstance corroborating this is afforded by 
the fact of the commissure of the bill, in both groups, 
being sinuated in the typical genera. From this point, — 
as the affinities recede of the two families, and become 
more and more distant, so, as a natural consequence, — 
do their analogies also become more remote. Hence, — 
those between the two most aberrant groups, Icterine 
and Coracine, appear to rest only on the fact of both 
being strictly composed of arboreal birds, having pecu-— 
liarly short feet, and living principally upon soft fruits. 
Finally, the most remote analogy is that between the 
Agelaine and the Fregiline, because they stand at the” 
confines of their respective circles ; and yet, as these 
two possess the common property of having the longest — 
wings in their respective circles, they must be repre- 
sentations of each other: this structure, we know, 
is eminently characteristic of fissirostral types ; so that. 
the circle of each having now been compared, we find 
they produce a perfectly uniform result, adding one 
more to those innumerable instances we have brought 
forward to demonstrate the LAW OF REPRESENT-— 
ATION. - 
(122.) We shall now throw these two groups into 
their proper circles, because the analogies will not only © 
be at once placed before the eye, but because these 
circles will also illustrate that apparent transportation of 
etd we have just before alluded to: — . 
