EXPLANATION OF PLATE 22. 



All figures are reproduced one-half natural size. 



Fig. 1. Megalonyx sierrensis, n. sp. Left scapula, external view. The 

 supraspinous portion has been broken away. 



Fig. 2. Articular surface of the right calcaneuni. 



Fig. 3. Inner side of the right calcaneuni. 



