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Fig. 83. Pachyena ossifraga, foot bones, natural size; 1, a, dorsal view of pes, b, inner 
view, c, distal view of trapezium showing small facet for mt. 1; 2, phalanges of hind foot; 
3, phalanges of fore foot. Skeleton No. 16154, Gray Bull beds, Big Horn Basin. 
