304 



THE VERTEBRATE SKELETON. 



(fig. 51, 17), to the second phalanx of the second digit. One 

 of the pre-digitals is very small, and is called the remicle 

 (fig. 57, 11). 



FIG. 56. THE WING OF A WILD DUCK (Anas bosclias). 



The upper figure shows the dorsal side of a right wing, the lower figure 



the ventral side of a left wing, x ^. (Brit. Mus.) 



1. scapulars. 6. metacarpo-digitals or pri- 



2. tectrices marginales. maries. 



3. tectrices minores. 7. tectrices mediae. 



4. bastard wing. 8. cubitals or secondaries. 



5. tectrices majores. 9. pennae humerales. 



10. pennae axillares. 



In addition, a group of three quill feathers is attached to 

 the first digit, constituting the bastard wing or ala spuria 

 (fig. 56, 4). 



The secondaries or cubitals (fig. 56, 8) form a group of 

 seventeen feathers, attached to the ulna ; they are shorter than 



