86 THE SKELETON OF THE CAT. 
bears dorsad, a short distance from its proximal end, a smooth 
tubercle, and ventrad a small convex facet. Both articulate 
with facets on the lateral surface of the third metatarsal. The 
lateral surface has a sinuous facet along its dorsal border, and 
ventrad of this a depression. There is a second facet along 
the ventral border. Both facets are for the fifth metatarsal, 
and the depression is for ligaments. 
The fi/th (5) has its base flattened and expanded so as to 
be wedge-shaped, with the apex of the wedge directed proxi- 
mad. Its dorsal end extends into atubercle. It thus presents 
only lateral and medial surfaces. The medial surface shows 
two tubercles, one distad of the other. The distal tubercle 
and the distal half of the proximal tubercle are facetted and fit 
into the sinuous facet on the fourth metatarsal. A narrow 
facet on the ventral border of the surface articulates with the 
facet on the ventral border of the lateral surface of the fourth 
metatarsal. The proximal half of the distal tubercle is facetted 
for the cuboid (c). The lateral surface is smooth, non-articular, 
and obliquely grooved. 
Phalanges (Fig. 58, 2, 7, &).—There are three phalanges 
in each of the four digits, and these are almost identical with 
those described for the manus. 
Sesamoid Bones. Ossa sesamoidea (Fig. 58, /).—The 
sesamoid bones are found at the joints between the metatarsals 
and phalanges, and are in all respects like those of the manus. 
JOINTS AND LIGAMENTS OF THE PELVIC LIMBS. 
Ligaments of the Pelvis.—The ilium and sacrum are articu- 
lated at the auricular facet of the ilium and the corresponding 
rough surface ofthe sacrum. The joint is an amphiarthrosis, per- 
mitting very little movement. <A capsular ligament surrounds 
the articular surface, being attached to the bones about its circum- 
ference; itis shortand strong. Craniad of the capsule is a thick 
very short ligament, composed of very strong transverse fibres 
passing from the rough surface of the sacrum to the correspond- 
ing rough surface of the ilium. This forms the lateral iliosacral 
ligament, which is united at its caudal border to the capsule. 
A strong, wide ligamentous band passes from the dorsal 
