107 



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

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

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

 cular convexities for the stemal ribs and the intermediate excava- 

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

 of the intervening osseous space ; in the specimen described they 

 were not quite symmetrical in position. The extentof the posterior 

 notehes 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 

 hetvveen the coracoid and rudimentai clavicle, of \vhich there is other- 

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

 inferior expanded extremity presents an articular convexity adapted 

 to the stemal 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, C5dindrical, styliform 

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

 ąt 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- 

 mentai bones of the antihrachimn, 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 projects 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 rudimentai hand is seven lines, inclu^įag the cla\v, -vvhich meu- 

 sures three lines and a hąlf. 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 

 sti'uthious birds. The puhic element is a slender bony style con- 

 nected by hgament 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 f emur is three inches, nine lines in length, slightly bent ; the 

 articular head presents a large depression for the strong and complex 

 Ugamentum 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- 

 fixed to it the ligament of the small cartilaginous;3a/e//a. The fbiila, 

 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 

 lo\ver third of the tibia. 



