SllUKKI.DT : OSIKOLOHV OF THK FlAMIXOOKS. 319 



any excavation at all. i'osteiioti)', in the case of tlie Flamingo, the 

 external condyle conies up higher on the shaft than the smaller inter- 

 nal ones, while in the Goose their extension in this respect is about 

 etiual. At the usual sites we observe that the i)its into which the ends 

 of various tendons and ligaments are inserted during the life of the in- 

 dividual, are circumscribed, and very distinctly marked. 



A good ■i'lzed />n/c//(r is present in the pelvic limb o{ Pha-iiicoptcnts, 

 it being nearly a centimeter and a half long, and about half as wide. 

 It is roughened on its antero-convex surface, but quite smooth upon 

 its postero-concave aspect. These sesamoids are thoroughly inde- 

 pendent of any connection with the tibio-tarsus of either side, being 

 simply encased in the tendon of the great extensor muscle of the leg, 

 in the usual manner. 



The nearly straight tilno-tarsus is of great length, measuring fully 

 33.5 cm. The summit of the bone is but slightly excavated for the 

 internal condyle of the femur, while the facet for the external condyle 

 is convex, oval in outline, and situated at the external angle of the 

 head of the bone. When the shaft is held in the vertical position, 

 this facet looks upwards, outwards, and slightly backwards. The 

 cnemial crest rises somewhat above the tibio-tarsal summit, being 

 composed chiefly of the procnemial process, which is large, oval, with 

 its upper part bent abruptly over to the outer side, Avhile below it is 

 not at all extended down u])on the shaft, from which it is produced 

 directly forwards. On the other hand, the ectocnemial process is pro- 

 duced directly outwards ; is smaller than the procnemial, triangular in 

 outline, and terminates in a blunted angle externally. It also fails to 

 be at all produced down upon the shaft of the bone. The fibular ridge 

 is comparatively short, and but slightly produced. For its proxi- 

 mal third, the shaft of the tibio-tarsus is somewhat antero-posteriorly 

 compressed, the surfaces being smooth. As we pass to the middle and 

 lower thirds of the bone, however, it becomes more or less oblong upon 

 horizontal section — the sides being flat, and the anterior and pos- 

 terior surfaces more or less longitudinally grooved, especially the 

 former. At the distal end we find the tibio-tarsal condyles, which 

 are here reniform in outline, each being antero-posteriorly elongated, 

 and slightly farther apart in front than they are behind. They project 

 a little in the latter situation, and considerably so in the former, where 

 they are thicker from side to side than they are elsewhere. The inter- 

 condyloid excavation is profound anteriorly, shallow below, and 



