142 THE MAMMALIA OF THE DEEP RIVER BEDS. 



member of the family. They are wide proximally and taper distal ly to a point, 

 which is more acute than in the other genera ; in the median pair (digits iii and iv) 

 the approximate borders are straight and the opposed borders curve distally towards 

 the median line. Proximally, the ungual has considerable vertical depth, but this 

 diminishes rapidly towards the distal point, and the dorsal surface is very convex 

 and strongly arched from side to side. The unguals of the lateral digits are like 

 those of the median pair, except for their very much smaller size. In brief, the 

 ungual phalanx is shaped like the half of a slender and somewhat irregular cone. 



Measurements. 



MALE. FEMALE. 



M. M. > 



Scapula, height 138 1. 140 



Scapula, greatest width 088 ?.090 



Scapula, width of neck 023 .021 



Glenoid cavity, antero-posterior diameter 027 .022 



Glenoid cavity, transverse diameter 025 .022 



Humerus, length .151 



Humerus, antero-posterior diameter of proximal end 056 .049 



Humerus, transverse diameter of proximal end 042 .039 



Humerus, width of distal end .039 



Clavicle, length ?.027 



Radius, length .137 



Radius, width of proximal end .027 



Radius, width of distal end .029 



Radius, width of shaft in middle .014 



Ulna, length .180 



Ulna, height of olecranon from sigmoid notch .030 



Ulna, breadth of shaft in middle .016 



Ulna, breadth of distal end .014 



Scaphoid, height .016 



Scaphoid, width of proximal end .012 



Lunar, height .017 



Lunar, width of proximal end .012 



Pisiform, length .023 



Metacarpal ii, length .054 



Metacarpal iii, length (not including unciform process) .065 



Metacarpal iii, width of proximal end .016 



Metacarpal iii, width of distal end .014 



Metacarpal iii, width of shaft below head .013 



Metacarpal iv, length .061 



Metacarpal iv, width of proximal end .013 



Metacarpal iv, width of distal end .012 



Metacarpal iv, width of shaft below head .012 



Metacarpal v, length .052 



First phalanx of third digit, length .021 



