ShUFEI.DT : OSTKOLOOY OK THK H F'.Kf)l )I()NES. 227 



aperture is hardly any larger, while the overspanning osseous bridge 

 is thick and strong. Proximad to these characters again, the anterior 

 aspect of the tibio-tarsal shaft is inclined to be slightly grooved for a 

 very limited distance. Nearly opposite each other on the borders of 

 this are two osseous tubercles. They are intended for the attachment 

 of the ligaiiient which holds in place some of the tendons during life. 



Fibula is strongly developed above the point where it articulates 

 with the fibular ridge of the tibio-tarsus. Then it begins gradually to 

 dwindle in size, and near the middle of the latter bone, fuses indis- 

 tinguishably with its shaft. We would note also, that its ligamentous 

 attachment with the fibular ridge of the tibio-tarsus is extremely close 

 for the entire length of that 'projection. 



On the summit of the tarso-metatarsus the concavities for the tibio- 

 tarsal condyles are deep, and standing between them in front is the 

 very pronounced articular process mentioned above. The short and 

 massive hypotarsus exhibits a wide and deep median longitudinal 

 groove for the tendons. The free edges of its sides are thickened and 

 each turned outwards away from the central excavation. 



To the outer side of the external aspect of this hypotarsus, and to 

 the inner of the inner side of the internal one, there is a foraminal 

 aperture, which passing through the shaft of the bone, in either case, 

 makes an appearance anteriorly immediately above the very distinct 

 and double tubercle for the insertion of the tendon of the tibialis an- 

 ticus muscle. This hypotarsal enlargement makes but a feeble attempt 

 to an extension down the shaft behind. As to the shaft itself, it is 

 (juite straight throughout. Its sides are flat, it being somewhat grooved 

 longitudinally for its entire length posteriorly, and very much more 

 profoundly so, anteriorly. In the latter case the groove is carried 

 from the summit down to within a short distance above the large 

 subelliptical perforating foramen of the anterior tibial artery, and even 

 this last has a deep and narrower groove running into it from above. 

 .\11 the distal trochlear processes are well-developed. The central 

 one is the lowest on the shaft, the two lateral ones descend about equal 

 distances, and then each turns in behind towards the median axis of the 

 bone. Between these trochlese the spaces dividing them are rather 

 wide, thus lending to the processes themselves a notable distinctness. 

 The median one is clearly marked by its articular groove for its entire 

 extent ; in the case of the other two, the groove is not at all evident 

 in front ; only faintly so distally, but becomes very manifest posteriorly. 



