PLATE XVI. 



This plate shows the apparatus of the posterior ligaments of the 

 articulation of the first phalanx with the second, and the disposition 

 of the strengthening sheath of the plantar aponeurosis at the sur- 

 face. 



A Median prolongation of the posterior ligament of the first phalangial 



articulation, or superficial sesamoidal ligament. 

 B Pair prolongations of the posterior ligament of the first phalangial ar- 

 ticulation. 

 C Lateral bands of the sheath of reinforcement at their point of insertion 



to the first phalanx. 

 O Section of the branch of the perforatus, above the lateral bands of the 



strengthening sheath. 

 S Semi-lunar crest. 



T Strengthening sheath at the surface of the plantar aponeurosis. 

 X Lateral bands of this sheath. 



