DISSECTING MANUAL. 



grooves forming the tarsal canal. A distinct synovial mem- 

 brane lines the capsule. [308] 



The talo-calcaneo-navicular is between the head of the as- 

 tragalus and the socket formed by the sustentaculum tali, 

 scaphoid, and inferior calcaneo-scaphoid ligament. Its capsule 

 is formed by the following ligaments, viz. : Inferior (internal) 

 calcaneo-scaphoid, a strong fibro-cartilaginous band running 

 from the anterior margin of the sustentaculum tali to the infe- 

 rior surface of the scaphoid, some of the upper fibres radiating 

 upward to join the tibio-navicular ligament: Superior (external) 

 calcaneo-scaphoid, short fibres running from the dorsum of the 

 os calcis, at the outer side of the sustentacular facet, to the 

 outer side of the scaphoid (it may articulate with an extra 

 facet on the postero-external part of the head of the astraga- 

 lus): Astragalo-scaphoid, a thin membrane running from the 

 upper non-articular area on the head of the astragalus to the 

 dorsum of the scaphoid and divisible into dorsal, lateral, and 

 medial parts or ligaments. The interosseous talo-calcaneal 

 ligament completes the capsule posteriorly. A distinct syn- 

 ovial membrane lines the capsule. [309] 



The calcaneo-cuboid is between the facets on the front of the 

 os calcis and back of the cuboid. Its capsule is formed by the 

 following calcaneo-cuboid ligaments, viz. : Internal (interosseous) , 

 short fibres in the tarsal canal, arising from the os calcis with 

 the superior calcaneo-scaphoid ligament, with which it forms 

 a V-shaped structure, and passing to the inner side of the cu- 

 boid : Dorsal, a broad band connecting the dorsal surfaces of the 

 bones : External, a narrower band running from the outer side 

 of the os calcis to the outer side of the cuboid, just behind 

 the sesamoid facet on its tubercle: Inferior, two in num- 

 ber, superficial and deep, which are separated by a layer of 

 areolar tissue. Of the latter the superficial set of fibres (long 

 plantar ligament) runs from the under surface of the os calcis, 

 in front of its tuberosities, to the under surface of the cuboid 

 ridge; many fibres continue under (superficial to) the Peroneus 



[266] 



