THE I'U'MAOK AM) ri.lCHl <)!•• lilKDS. 



11 



covered with tskin, nnd jifTonUng n solid basis on ^vlli^■ll the feathers rest. Tlic wing, 

 ■which is, in fact, the arm of tlie bird, consists, as in man, of the true-arm, the fore-anu, 

 and the hand. 



The true-ann consists of the /noiicriis (a), a cyliwh'ieal and hollow bone, the head of 



FIG. 8,— BOSKS OF THE WING. 



which is received into a shallow ca\ Ity of the xrnpuki, or'shonlder-blado («), at the angle 

 made by the sndden turn and descent of the large conifoirl process, -which is attached at its 

 posterior extremity to the anterior margin of the breast-bone. The fore-arm consists of 



FIG. 9. — FEATHERS OF A BIRD. 



an ulna (is) and a radius (c), which is very slender. The ulna has often a row of tubercles 

 on the upper surface, denoting the situation of the barrels of the secondary quill feathers, 

 to -n-hich it j-ields support. The hand is dix-ided, as usual, into carjms (d), mcfacarpus (e), 

 o.uA phalanges ; but, so far from being flexible, as the name suggests, it is a firm, inflexible 



