86 [[July, 1846. 



times the breadth of the bone opposite, at its middle ; there are two pha- 

 langes to the radial finger ; the ulnar phalanx is a slender styhforni ap- 

 pendage pointed inferiorly. 



The pelvis is narrow in front, broad posteriorly ; it presents a small pro- 

 cess on each side three lines behind the last rib , that portion of the pelvis 

 comprised between this process and the cotoloid cavity is much compressd; 

 the ossa pubis look backwards as in most birds ; the cotyloid cavity is 

 incomplete posteriorly. 



Posterior extremities. There is no proper neck to the femur; the large 

 trochanter presents a well marked rough process posteriorly ; there is no 

 small trochanter ; on the lower side of the trochanter at its inferior extremity 

 upon the anterior face of the bone, is a foramen three lines in length and two 

 in breadth, for the admission of air ; the outer condyle of the femur is large ; 

 the groove upon inferior part is well marked; there is a rough eminence upon 

 its external face, with a depression in front of it ; the upper surface of the 

 tibia is flat for the most part ; the anterior margin projects considerably be- 

 yond the anterior face of the bone, but there is no spine extending upwards 

 as in some birds ; the superior extremity of the tibia is remarkable for the 

 deep pit which it presents upon its posterior face ; it measures twelve lines 

 in length ; there are two holes at its distal extremity situated posteriorly, 

 with an oblique ridge between them ; it is triangular in form above, 

 rounded in the middle, and flattened inferiorly ; a marked depression ex- 

 ists upon the anterior face of it, at its inferior extremity. The foramen for 

 the transmission of the interosseous artery is placed two and a quarter 

 inches from the head of the tibia, about a line from its junction with the fi- 

 bula ; the fibula is a slender bone anchylosed with the tibia in the greater 

 part of its extent, as in other birds. The tarso metatarsal is the most remark- 

 able bone in the body ; it is a large and powerful bone, concave posteriorly, 

 presenting numerous very well marked depressions and elevated ridges upon 

 its anterior aspect ; there is a foramen for the transmission of air near its 

 outer margin, five lines from its proximal extremity; there is also another two 

 lines in breadth, and two in extent, near its inner margin, within two and a 

 half lines of the superior margin of the outer groove, at the extremity of the 

 bone; the outer aspect of the bone is flat in nearly its whole extent, presenting 

 a smooth surface ; it measures seven lines in an antero-posterior direction at 

 its middle ; its inner margin forms a sharp edge extending the whole length 

 of the bone as far as its junction with the accessory bone, for the articulation 

 with the first phalanx of the powerful back toe ; the articular eminences at 

 the extremity of the bone are separated from each other by intervals each 

 about two lines in breadth ; the middle eminence is the largest ; the remain- 

 ing two are of nearly equal size ; the articulation of the accessory bone is 

 placed seven lines and a half above the level of the anterior toes ; the access- 

 ory bone is large and triangular in shape, presenting a smooth surface for its 

 articulation with the first phalanx of the hind toe ; its posterior margin mea- 

 sures thirteen lines in length ; it presents a sharp edge continuous with 

 that of the inner margin of the tarso metatarsal bone for seven lines 



