G92 Mil. r. G. PABSONS ON THE [June 16, 



fibular joint has anterior and posterior ligaments ; its synovial 

 cavity is in direct communication with the knee-joint. 



Tlio AnJde-joint has feeble anterior and posterior as well as 

 strong lateral ligaments. The internal lateral consists of a super- 

 ficial aud a deep portion ; the former is a narrow flat band which 

 passes from the bade of the internal malleolus downward and 

 forward to the navicular ; the deep is much broader aud stronger 

 and runs downward and backward from the anterior part of the 

 side of the malleolus to the sustentaculum tali, forming an X with 

 tlie superficial part. The external lateral ligament consists of 

 three bundles — superficial, middle, and deep ; the superficial passes 

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

 ealcaneum just behind the articulation with the cuboid ; the middle 

 is thicker aud stronger, and runs downward and backward froui the 

 anterior part of the malleolus to the prominent tuberosity on the 

 outer side of the calcaueum, crossing the superficial bundle to form 

 an X ; the deep band runs almost directly backward from the 

 posterior part of the malleolus to the outer side of the astragalus. 



¥is. 6. 





'H 



Ankle-joint of Peiroffale, fi-oin the inner side. 



In the Foot there are two calcaneo-cuboid ligaments, the outer 

 of which is very strong aud runs from the under surface of the 

 ealcaneum to the cuboid and on to the bases of the fourth ajid 

 fifth metatarsals. The inner is much smaller and passes from the 

 sustentaculum tali to the bases of the second and third metatarsals 

 and slightly to the cuboid. As the inner longitudinal arch of the 

 Kangaroo's foot is not developed, the calcaneo-navicular ligament 

 is not very strong. The mechanism of the Kangaroo's foot is 

 interesting, and I hope to deal with it more fully in a subsequent 

 paper. 



