670 THE BEIDGEE EPOCH. 



shaft becomes flattened in front and on the inner side The distal articular 

 extremity is impressed by 1§ trochlese, the outer being completed by the 

 fibula. The posterior tuberosity is more nearly median than usual, hence 

 the inner margin of the inner trochlea is low posteriorly, and the inner 

 malleolus has a considerable beveled inferior margin. The fibula has a 

 slender shaft, but little compressed. The head is expanded fore and aft, 

 and the malleolus is quite stout. 



Measurements. 



K. 



Length of tibia 0.244 



Diameter from outer augle of head to inner angle of crest 065 



Diameter distal end (greatest) 035 



Diameter articular face, transverse 027 



Diameter .articular face, fore and aft 026 



Both hind feet are perfectly preserved. The calcaneum is rather elon- 

 gate and compressed, the lower face truncate with two longitudinal bound- 

 ing ridges, the outer of which is discontinued before reaching the heel 

 The surface between them is striate grooved. The outer face is slightly 

 concave. The astragaline facets are much expanded inward; the outer is 

 transverse and strongly convex, and separated by a groove from the inner, 

 which is longitudinal and nearly plane. The posterior edge of this and 

 convexity of tlie outer facets are received into a transverse groove of the 

 posterior part of the lower face of the astragalus. The cuboid facet is 

 diagonal, and is bounded within by a third narrow facet for the astragalus. 

 The asta-agalus has a strongly convex, deeply grooved trochlea; the con- 

 vexity extends over 15H°. The trochlea is nearly in the vertical, a little 

 oblique to the longitudinal axis of the foot. The exterior malleolar facet is 

 well marked, and bounds a lateral fossa above. The neck of the astragalus 

 is broad and not contracted, but not wider than the trochlea. Its navicular 

 facet is wide and concave, the cuboid narrow, with a long angle behind. 

 The cuboid is quite elongate, and with a narrow anterior face; it has a 

 large posterior tuberosity not projecting much posteriorly. The navicular 

 is flat, with a sigmoid proximal face, convex on the inner side, concave on 

 the outer. It has the three cuneiform facets below, the inner anteroposterior. 

 The entocuneiform is flat with anteroposterior plane, and apex directed back- 

 ward, and considerably oblique facet for the second metatarsal. The meso- 



