PELVIC LIMBS 



787 



there is a grooved area for the flexor longus hallucis tendon on the supe- 

 rior surface behind the trochlea. The trochlea lacks the deep longitu- 

 dinal groove and is flatter. On the outer surface is the articular surface 

 for the fibula, which is larger than the articular surface for the tibia on 

 the inner surface. The lower surface resembles that surface on the 

 astragalus of the cat; it presents two facets for the calcaneum. The head 

 articulates also with the calcaneum, but principally with the scaphoid. 



The calcaneum is relatively shorter than in the cat ; the superior 

 surface, behind the articular surface for the astragalus, is broader. 

 The posterior surface is larger and more swollen on the plantar side 

 to form definite internal and external tubercles. The lesser process, 



FIG. 611. 



FIG. 610. 



RIGHT FOOT, DORSAL SUR- 

 FACE. 



1, body of the astragalus; 2, its 

 head; 3, calcaneum; 4, scaphoid 

 bone; 5, 6, 7, ento-, meso-, and 

 ectocuneiform bones; 8, cuboid 

 boue; 9, metatarsal bones; 10, 11, 

 phalanges of the great toe; 12, 13, 

 14, phalanges of the other toes. 



SOLE OF THE LEFT FOOT. 



1, concavity of the calcaneum; 2, 

 outer face of the same ; 3, groove for 

 the tendon of the flexor longus hal- 

 lucis; 4, head of the astragalus; 5, 

 scaphoid bone ; 6, its tuberosity ; 7, 8, 

 9, ento-, meso-, and ectocuneiform 

 bones ; 10, cuboid bone ; 11, its 

 groove for the tendon of the pero- 

 neus longus muscle; 12, metatarsal 

 bones ; 13, first row of phalanges ; 14, 

 second row ; 15, third row ; 16, last 

 phalanx of the great toe. 



or sustentaculum, on the inner surface is well developed, as is the con- 

 cavity beneath for the flexor tendons. The outer surface is grooved 

 for the peroneal tendons. The anterior surface presents a triangular 

 slightly concave facet for the cuboid. The articular facets on the 

 upper surface are shorter and more angular than in the cat ; of the 

 two, the outer is much the larger. 



