PLATE IY. 



This cut represents the third phalanx seen from its pos- 

 terior part ; and the navicular bone, inferior, superior, and 

 anterior views. 



Fig, L 



Posterior Part of the Third Phalanx (ADULT). 



A. Semi-lunar crest. 



D. Basilar process. 



F. Superior border. 



G. Spreading out of the articular face. 



K. Anterior view of the pyramidal eminence. 



M. Posterior view of the inferior face. 



N. Glenoid cavity of the superior face. 



Q. Portion of the articular surface corresponding to the anterior bor- 

 der of the navicular bone. 



R. Retrossal process. 



S. Edge of the plantar fissure. 



V. Posterior border of the third phalanx. 



X. Plantar orifice for passage of blood vessels. 



Fig. II. 



Posterior Part of the Third Phalanx (COLT). 



A. Semi-lunar crest. 



D. Basilar process. 



F. Superior border. 



M. Posterior view of the bone. 

 R. Retrossal process. 

 S. Plantar fissure. 



Fig. IIL 



Inferior Face of Navicular* 



C. Transverse ridge. 



E. Anterior border. 



H. Extremity of the bone. 



Fig. IV. 



A. Median ridge or bulge of the superior face. 



D. Anterior superior border. 



E. Anterior inferior border. 



G. Posterior border (is very thick, and cribbled or pierced with vas- 



cular orifices). 



Fig. V. 



Anterior Face of Navicular. 



E. Soft part hollowed under the anterior articular facet. 

 H. Articular facet corresponding to the posterior facet of the third 

 phalanx. 



