v///: rnsT]-:i;i<m 



10:; 



Fig. 65. 



between tho tibia and the scaphoid, and divided into five faces : 



1, A superior and anterior, formed as an 

 articular pulley to correspond to the in- 

 ferior extremity of tho tibia; this pulley, 

 obliquo from above downwards, forwards, 

 and outwards, may be considered as the 

 typo of the most perfect trochlea in the; 

 organism; its groove receives the median 

 tenon of ^he tibia, and its two ridges or lips 

 fit into tho lateral furrows of that bone. 



2, An inferior face, occupied by a slightly 

 convex articular surface responding to the 

 scaphoid ; this surface is notched outwardly 

 by an excavation for ligamentous insertion. 



3, A posterior face, irregular, cut into three 

 or four diarthrodial facets adapted for 

 similar facets on the calcaueus, and which 

 are separated by a wide, rugged excavation. 



4, An external face, covered with imprints. 



5, An internal face, provided below with 

 a small tubercle of insertion. 



Calcaneus. A bone vertically elongated, 

 flattened on both sides, and presenting two 

 faces, two borders, and two extremities. 



The external face is smooth and nearly 

 plane. The internal face is excavated into 

 a gliding groove to form the tarsal arch, in 

 which passes the tendon of the perforans. 

 The anterior border is slightly concave. 

 The posterior border is thicker, straight, 

 and rugged. The superior extremity, 

 slightly tuberous, constitutes the summit 

 of the calcaneus, and is divided into three 

 parts : a middle, which gives attachment to 

 the tendon of tho gastrocnemius ^ the other, 

 the anterior, is a smooth surface on which 

 this tendon rests when the foot is imu-h 

 flexed ; the third, altogether posterior, also 

 constitutes a gliding surface for the tendon 

 of the perforatus. The inferior extrt-mih/. 

 wide and voluminous, shows in front three 

 or four articular facets which correspond 

 i MIND FOOT; EXTERNAL to the astragalus, and are separated, like 

 those of the last bone, by an irregular and 

 , Tibia ; 2 Summit of cakis r cal- Kl j,, nt ] v excavated surface of insertion. 



caucus; 3, Astragalus; 4, Cuboid ; T> i " -A v f i i- -.11 



<,,,;, ' Below, it shows for articulation with the 



num; 7, Urge metatarsal bone; Cuboid a fifth facet, Continuous with one of 



8, Small mi'tatarsnl bone; 9, Suf- the preceding, 

 fraginis, proximal, or first phalanx; ,', nt. The calcaneus 18 dove- 



''[:,' loped from two nuclei of ossification, one of 



IVIal ' b,,M-, ..r third or di>tai which is for the summit. 



phalanx; 14, Navicular boms i'. Cuboid bone. This little bone, situated 



Basilar process of pedal bone. a t the external side <!' the scaphoid and the 



