EDENTATA OF THE SANTA CRUZ BEDS. 



197 



Metacarpal IV, length 049 



" " width of proximal end .013 

 " " " " distal end 014 



Metacarpal V, length 043 



" " width of proximal end .. .on 

 " " " distal end 007 



First phalanx, digit II, length 016 



" " " III, length 017 



First phalanx, digit III, width of proxi- 

 mal end 016 



First phalanx, digit III, thickness of 

 proximal end 020 



First phalanx, digit IV, length 015 



First phalanx, digit IV, width of proxi- 

 mal end 014 



First phalanx, digit IV, thickness of 

 proximal end 02 1 



First phalanx, digit V, length 009 



First phalanx, digit V, width of proxi- 

 mal end 009 



First phalanx, digit V, thickness of proxi- 

 mal end OI2 



Second phalanx, digit II, length 027 



Second phalanx, digit II, width of 

 proximal end 012 



Second phalanx, digit II, thickness of 

 proximal end 016 



Second phalanx, digit III, length 025 



Second phalanx, digit III, width of 

 proximal end 015 



Second phalanx, digit III, thickness of 

 proximal end 020 



Second phalanx, digit IV, length 0235 



Second phalanx, digit IV, width of 



proximal end 0115 



Second phalanx, digit IV, thickness of 



proximal end 017 



Second phalanx, digit V, length 013 



Second phalanx, digit V, width of 



proximal end 008 



Second phalanx, digit V, thickness of 



proximal end oio 



Ungual, digit I, length 032 



" " " width of proximal end .010 



Ungual, digit I, thickness of proximal 



end 012 



Ungual, digit II, length 050 



" " " width of proximal end .012 



Ungual, digit II, thickness of proximal 



end 017 



Ungual, digit III, length 057 



" " " width of proximal end .014 



Ungual, digit III, thickness of proximal 



end 020 



Ungual, digit IV, length 047 



" " " width of proximal end .oil 



Ungual, digit IV, thickness of proximal 



end 019 



Digit I, length (approx) 060 



"II, " 104 



" III, " 112 



"IV, " no 



" V, " (approx.) 080 



The pelvis differs notably from that of the large Pleistocene genera 

 and has a certain resemblance to that of Bradypus; most of its length 

 and width are made up of the ilia, the ischia being much smaller. The 

 ilium has a broad, depressed and very short peduncle, the sacral surface 

 extending back almost to the level of the acetabulum ; anteriorly the ilium 

 reaches considerably beyond the sacrum and partially conceals the second 

 lumbar vertebra, when viewed from the side ; the anterior plate is broad 

 and flat, with acetabular border external, making the gluteal surface dorsal 

 and the iliac surface ventral, even more strictly so than in Bradypus ; the 

 acetabular border describes a considerable curve, with the concavity turned 



