1898.] 



ANATOMY OF MDETES OAFFBE. 



877 



the external semilunar cartilage ; over this the popliteus tendon 

 glides (see fig. 6, A.S.). 



The Ankle-joint. — A strong ligament runs from the front of the 

 lower extremity of the tibia, just at the upper attachment of the 

 anterior ligament of the ankle, forward to join the expansion of 

 the extensor longus digitorum on the inner side of the medius 

 digit and opposite the metatarso-phalangeal joint. The anterior 

 ligament of the ankle is very feeble and has a layer of fat between 

 it and the synovial membrane. The posterior ligament is 

 practically absent. The external lateral ligament consists of 

 three bands : the most superficial runs from the tibia at the 

 posterior margin for the groove of the peroneals to the upper 

 margin of the outer surface of the calcaneum just below the tip of 

 the external malleolus. A. second ligament runs downward and 

 backward, from the anterior border and tip of the external 

 malleolus, crossing deeply to the last ligament and being attached 

 to the calcaneum just behind it. A third ligament runs from 

 the back of the external malleolus to the outer side of the 



I^ig. 7. 



F- H. 



Inner view of ankle and foot of Pedeies. 



A. Internal lateral ligament. 



B. Tibial ossicle. 



C Plexor tibialis tendon. 



D. Rudimentary 1st metatarsal. 



E. Tibialis anticus tendon. 



F. Sustentaculum tali. 



G. Ligament running forward to 



dorsum of toe. 

 H. Calcaneo-navicular ligament. 



astragalus. It will be noticed that the last-named two bands 

 correspond to the middle and posterior fasciculi of the human 

 external lateral ligament, but that the anterior fasciculus of that 

 ligament is absent. The internal lateral ligament consists of two 

 bands, superficial and deep ; the superficial runs downward and 

 forward from the internal malleolus to the sustentaculum tali ; 

 the deep band is shorter and runs from the same place downward 

 and backward to the inner side of the astragalus. 



