244 VERTEBRATE REMAINS, PORT KENNEDY BONE DEPOSIT. 



Proximal parts of the third and fourth left metatarsals are present. They are 

 remarkable for the wide and open anteroposterior grooving of the heads. The 

 heads of both are notched in front of the middle of the external margin. The 

 diaclast of the third is obtuse. The superior part of the shaft of the same is 

 grooved longitudinally ; the external face of the fourth is convex and fossate above 

 and posteriorly, indicating that the fifth metatarsal was small. An ungual phalange 

 lacks the apex. Its tendinous insertion is as prominent and pedicellate as fully as 

 in a true cat, showing that the ungues possessed the retractile character as fully as 

 any of the modern Felicia?. In size this phalange equals that of the lion. 



Measurements. 



mm. 

 Astragalus. 



Greatest length ; 48 



width ; 38 



Width of trochlea ; 27 



Diameters of head < , ' nc 



( transverse; 2d 



External elevation of trochlea ; • 22 



Calcaneum. 



Total length ; 78 



Width at extremity of tuber; 21 



Depth at " " 25 



Depth at ectal astragalar facet; 35 



Width at sustentaculum ; 31 



Diameters of head \ 7 r 1C ' n _ 



( transverse ; 1 1 



Metapodials. 



-n • , ,. , c , o ( anteroposterior; 19 



Proximal diameters oi mt. o < , r / -,x , . 



( transverse (exposed) ; 14 



-r, , j. c , A I anteroposterior; 22 



Proximal diameters oi mt. 4 < , r -. _ 



( transverse ; 1 / 



Width of mt. 3 at distal angle of diaclast ; 1 6 



" of mt. 4 at same point; 14 



Ungual phalange. 



f vertical ; 19 



Diameters of inferior tuberosity^ anteroposterior; 18 



(transverse; 11 



The remains above described, prove that during the Megalonyx epoch eastern 

 North America was inhabited by a saber-tooth as large as the existing lion, which 

 preyed on the other large mammals of the fauna. Its long, compressed, saber- 

 shaped canine teeth were better adapted for the destruction of the sloths and bears 



