160 University of California Publications. [Geology 



Mj, anteroposterior diameter of grinding face 28 mm 



M u transverse diameter of grinding face 12 



jVL, antero-posterior diameter 17 



Mo, transverse diameter 20 



M. s , antero-posterior diameter 16 



M 8 , transverse diameter 23 



M 4 , antero-posterior diameter 17 



M 4 , transverse diameter 23.5 



Greatest length from glenoid cavity of scapula to superior 



scapular border 295 



Distance from glenoid border to posterior inferior angle of 



scapula 136 



Greatest width of glenoid cavity of scapula 102 



Greatest length of glenoid cavity of scapula 100 



Greatest length of calcaneum 142 



Greatest width of fan-like expansion of tuber calcis 131 



Width of neck of tuber calcis at narrowest point 67 



Greatest width of posterior margin of tuber calcis 39 



Least width of posterior margin of tuber calcis 13 



Distance from posterior extremity of tuber to inferior border 



of astragalar facet 106 



Greatest dorso-plantar diameter of navicular 70 



Greatest transverse diameter of navicular 64 



MEGALONYX ( ?) , Sp. 

 PI. 23, Fig. 6. 

 Locality. — Potter Creek Cave. 



The large molar shown on plate 23, figure 6 (No. 8705) is 

 doubtfully referred to Megalonyx. It is oblong in outline, with 

 one of the narrow lateral faces convex and the other with a 

 median groove. The remaining faces are respectively broadly 

 concave, and convex with a low median convex rib. At either 

 extremity of the deep groove crossing the triturating surface 

 there are shallow concavities separated from each other by a con- 

 vex surface. In this respect, and in the shape of the crown and 

 its superior size, the tooth is unlike that of any species of 

 Megalonyx known from this state. In shape the tooth is also 

 unlike Mylodon. It is broken off a short distance below the 



triturating surface. 



Measurements. 



Antero-posterior diameter of molar at widest part 16 mm 



Transverse diameter of molar 27.5 



