107 



are produced into two strong triangular processes, with the apex ob- 

 tuse. The costal margin is thickened, and when viewed anteriorly, 

 presents an undulating contour, from the presence of the four arti- 

 cular convexities for the sternal ribs and the intermediate excava- 

 tions ; the breadth of each lateral perforation is nearly equal to that 

 of the intei-vening osseous space ; in the specimen described they 

 were not quite symmetrical in position. The extent of the posterior 

 notches is equal to one half the entire length of the sternum. 



The scapula and coracoid were anchylosed ; a small perforation 

 anterior to the articular surface of the humerus indicates the separation 

 between the coracoid and rudimental clavicle, of which there is other- 

 wise not the least trace. The coracoid is the strongest bone ; its 

 inferior expanded extremity presents an articular convexity adapted 

 to the sternal groove before described. The scapula reaches to the 

 third rib ; it is slightly curved and expanded at both ends, but chiefly 

 at the articulation. The humerus is a slender, cylindrical, styliform 

 bone, slightly curved, one inch, five lines in length, slightly expanded 

 at both extremities, most so at the proximal end, which supports a 

 transverse, oval, articular convexity, covered with smooth cartilage, 

 and joined by a synovial and capsular membrane to the scapulo- 

 coracoid articulation. A small tuberosity projects beyond each end 

 of the humeral articular surface. The distal end of the humerus is 

 articulated by a true but shallow ginglymoid joint with the rudi- 

 mental bones of the antibrachium, and both the external and in- 

 ternal condyles are slightly developed. The radius and ulna are 

 straight, slender, styliform bones, each nine lines in length ; a slight 

 olecranon })rojects above the articular surface of the ulna ; there is 

 a minute carpal bone, two metacarpals, and a single phalanx, which 

 supports the long, curved, obtuse alar claw ; the whole length of 

 this rudimental hand is seven lines, including the claw, which mea- 

 sures three lines and a half. A few strong and short quill feathers 

 are attached by ligament to the ulna and metacarpus. 



The iliac bones in size and shape present the character of the 

 struthious birds. The pubic element is a slender bony style con- 

 nected by ligament to the end of the ischium, but attached by bone 

 only at its acetabular extremity. A short pointed process extends 

 from the anterior margin of the origin of the pubis. The acetabulum 

 is produced anteriorly into an obtuse ridge. 



The femur is three inches, nine lines in length, slightly bent ; the 

 articular head presents a large depression for the strong and complex 

 ligamentum teres. The condyles of the femur are separated by a 

 wide and deep groove anteriorly, and by a triangular depression be- 

 hind. The tibia is five inches long. Two angular and strong ridges 

 are developed from the anterior part of the expanded head of the 

 tibia : the external one affords attachment to fascia, and to the ex- 

 panded tendon of the rectus femoris latissimus ; the internal has af- 

 fi.xed to it the ligament of the small cartilaginous patella. The fibula, 

 half an inch below its head, is anchylosed to the tibia, the attach- 

 ment continuing for about ten lines ; after an interspace of nine lines 

 it again becomes anchylosed, and gradually disappears towards the 

 lower third of the tibia. 



