1887.] 



OK THE WINGS OF BIUDS. 



351 



Vis. 2. 



Mr I 



Mc2 

 Phi 1 Ph.2 



jClau) 



a. Preparation of the manus of the Ostrich, showing the primaries and the 



manner of tlieir attachment to the bones. 



b. Dorsal view of the antebrachium and manus of the wing of the Ostrich.' 

 e. Ventral view of the manus of an euibrjo Ostrich. 



M, metacarpals ; B, digitals ; Ad, addigitals ; Md, middigitals ; Pd, predigitals ; 

 Cu, cuneiforme; Mc 1, 2, 3, meiacarpals 1, 2, 3; Ph 1, 2, 3, phalanges 

 1, 2, 3; I, II, HI, digits i, ii, iii ; T.Mj, tectrices niajores; T.Md, tec- 

 trices mediae ; T.JSIn, tectrices minores ; M, marginals ; Al, penna; pol- 

 licis (alula) ; 1, beneath this fold are the two ventral t. majores mentioned 

 in the text; a', tectrices majores inferior. 



feathers except for one row, the t. majores of the lower surface. If 

 the feathers be cut short, so that only the base of the quill is left 

 in the skin, their arrangement can then be satisfactorily studied 

 {cf. fig. 2). On looking at the figure (2, a), the reniiges, It, are seen 

 in their natural position, next a row of t. majores, T.Mj, then the 



24* 



