PLATE III. 



Various bones of the skeleton. 



Fig. 7. Ante];ior view of skull, the lower mandible having been removed. 



Fig. 8. H, humerus; i, ulnar tubercle; i', oblique tubercle for radius and ulna; 

 li, radial crest ; S A and S' A', scapular arch ; S and S', scapula ; G and C, clavicle ; 

 Cr and CV, coracoid ; /, perforating foramen. 



Fig. 9. H' , humerus; li", radial crest; p f, pneumatic foramina; S A" and S A'", 

 scapular arch; (S" and *S''", scapula; C" and C", clavicle; Or" and Cr'", coracoid; 

 /', perforating foramen. 



Fig. 10. R A, hyoid arch; a, suj)erior view of atlas; a', the same viewed laterally ; 

 6, the axis; o, its odontoid jirocess. 



Fig. 11. Right carpus of Buho Virginian us, outer aspect, with the bones composing 

 it moA'^ed partly from their normal positions to show articulating surfaces; rd, radius; 

 ul, ulna; s, scaphoid; c, cuneiform; ?», metacarpus; d, index digit. 



Fig. 12. Right radius and ulna, Speotyto, inner aspect ; u, ulna ; r, radius ; y, artic- 

 ular facet for oblique tubercle of humerus, y' for ulnar tubercle of humerus. 



Fig. 13. The same bones, inferior surface, when in j)osition and the wing closed : 

 r', radius; u', ulna. 



Fig. 14. Posterior surface, right metacarpus. The differences in form and position 

 of such portion of the articular surface in the metacarpus as is shown by s and z', in 

 Figs. 11 and 14, between Bul)o and Speotyto, are here seen; flat and rounded below in 

 the first, prominent and pointed in the second. 



Fig. 15. Anterior surfaces, right tibia and fibula ; I<', fibula; T, tibia. 



Fig. 16. Posterior surfaces, same bones ; F', fibula ; T, tibia. 



Fig. 17. Right femur; r, posterior surface ; r', anterior surface. 



Fig. 18. Anterior surface, right tarso-metatarsus ; m, bony bridge over tendons ; j, 

 foramen for anterior tibial artery ; e, facet for otiter toe, ?, for middle, and f for inner toe. 



Fig. 19. Posterior surface same bone ; f, the foramen for the anterior tibial artery ; 

 e" facet for outer toe, I" for middle, and i" for inner toe ; t, facet for os metatarsal© 

 accessorium. 



Fig. 20. A, right os metatarsale accessorium, superior surface; B, base or in- 

 ferior surface of right tarso-metatarsus; e', facet for outer toe, i, for middle, and t' for 

 inner toe. The section of the shaft shows just above the middle facet, on the 

 posterior aspect, ranging near the middle third of the bone. 



