532 
Mil MACGlLLIVllAY ON 
thers somewhat loose, their barbs bristly; two very 
long bristly feathers in the tail, barbed externally at 
the tip, and gyrate. 
Paradisea seocsetacea. Gold-breasted Paradise-Bird. 
P, plumis hypochondriis longitudine alarum laxis apice 
rotundatis, rigidis, metallizatis ; capitis utrinque tribus 
setosis apice barbatis. 
Feathers of the hypochondria of the same length as the 
wings, loose, rounded at the tip, stiff, with metallic 
lustre ; three bristly feathers on each side of the head, 
barbed at the tip. 
Paradisea nigricans. 
P. plumis hypochondriis oblique tortis, quatuor posteri- 
oribus in seta desinentibus simplici, abrupte curvata, 
pectoralibus elongatis, lateralibus oblique curvatis, la- 
tissimis, margine metallizatis. 
Feathers of the hypochondria obliquely twisted, the four 
posterior terminating in a simple bristle, which is 
abruptly bent; side-feathers obliquely curved, very 
broad, with metallic lustre on the margin. 
CORVUS. 
The genus Corvus may be taken next for illustration of 
the method proposed. And here it is necessary to remark, 
that where the forms and other qualities of feathers are not 
very prominently marked, or rather not obviously singular, 
it is impossible, in the deficiency of terms, to render those 
forms and qualities perfectly intelligible by ordinary lan- 
guage. In the genus Corvus, therefore, where some diffi- 
culty exists, instead of inventing terms to express the qua- 
lities of the plumage, I shall merely point out such of those 
qualities as are necessary for specific distinction, in a some^ 
