1887.] 



OF THE WINGS OF BIRDS. 



351 



Fig. 2. 



Mr I 



T.Md 



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

 manner of their attachment to the bones. 



h. Dorsal view of the antebracliium and manus of the wing of the Ostrich.' 



c. Ventral view of the manus of an embryo Ostrich. 



M, metacarpals ; B, digitals ; Ad, addigitals ; Mi, middigitals ; Fd, predigitals ; 

 Cu, cuneiforme; Mc 1, 2, 3, metacarpals 1, 2, 3; Fh 1, 2, 3, phalanges 

 1, 2, 3; I, ri, m, digits i, ir, in; T.Mj, teetrices majores; T.Md, tec- 

 trices medi« ; T.Mn, teetrices minores ; M, marginals ; Al, penuis pol- 

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

 in the text; a', teetrices 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 

 (c/. fig. 2). On looking at the figure (2, «), the reniiges, U, are seen 

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



24* 



