INTRODUCTION. 



IS. 



DIAGRAM OF THE BONES OF ANTERIOR EXTREMITIES OF FLYING 

 VERTEBRATES. 



^C 



IV 



III 



I BAT.-a. Scapula, b. Humerus, c. Radius, d. Rudiment of 

 ulna ancbylosed to radius, e. Carpus. /. Metacarpus, g. Pha- 

 langes. 



II. Pteeodactyle.— References the same as in Fig. I. 



III B.HD.-References as in Fig. I. The dotted outline of the second 



ungual phalanx indicates the occasional occurrence of a claw at 

 this point. The majority of birds are without it. 



IV AKCH.oPTKKvx.-ReferencesasinFig.I. The dotted outlines seen 



at carpus and the terminal phalanges are restored portions. 



