36 ELEMENTARY SKETCH OF THE OSTEOLOGY OF BIRDS. 



Plate IV. 



(EXPLANATION.) 



Fig. 1. — Anterior view of right humerus of Anser alhifrons — 

 " Oiseaux fossiles de la France y"* pi. 18, fig. 1. 



b.a. groove for brachialis h. head. 



anticus muscle. i.e. internal condyle, 



b.i. groove for biceps muscle, pc. pectoral crest, 

 e.c. external condyle. 



Fig. 3. — Anterior view of left tibio-tarsus of Anser alhifrons,— 

 Ibid, pi. 14, fig. 1. 



as. astragalus. hr. bridge over extensor ten- 



dons, 

 en. cnemial crest. 



Fig. 3. — Posterior view of right femur of Aquila fulva. — Ibid^ 

 pi. 2, fig. 4. . 



ec. external condyle. l.t. fossa for ligamentum teres. 



i.e. internal do. tr. great trochanter. 



h. head, pop. popliteal space. 



Fig. 4. — Inferior view of seventh cervical vertebra of Aquila 

 fulva. — Ibid^ pi. 6, fig. 13. 



c. centrum. pz. prezygapophysis. 



pt.z. postzygapophysis. 



Fig. 5. — Anterior view of left tarso-metatarsus of Aquila fulva.--' 



Ibid, pi. 3, fig. 1. 

 h. head. tr. digital trochlese. 



Fig. 6. — Anterior view of left coracoid of Aquila fulva.— Ibid 

 pi. 4, fig. 6. 



