1900.] 



Osborn, Oxyceua and Patriofelis Restudied. 



275 



dyle and entepicondylar foramen ; olecranon process of ulna 

 elongate, ulna grooved anteriorly ; limited rotation of forearm 

 owing to proximal expansion of radius ; feet spreading ; trape- 

 zium extended transversely (as in Pinnipedia, Wortman) ; dorsal 

 portion of distal metapodial facets hemispherical, ventral portion 

 keeled (as in Fissipedia, Wortman) ; digits angulate, the second 



Fig. 6. Patrio/elis ferox. Lower jaw, left side ; A, crown view; A', external view; 

 A^ internal view of 4th premolar (No. 1508 coll. A. M. N. H.). 



phalanges strongly flexed upon first phalanges ; subungual 

 (retractile) processes of distal phalanges well developed (as in 

 Pinnipedia ; in Fissipedia subungual processes small, foramen 

 vestigial, Wortman) ; ilium expanded on superior (post-iliac) 

 border into a broad lamina ; pubic symphysis not anchylosed ; 

 patella large ; fibula unreduced, articulating with side of astraga- 

 lus but not articulating with calcaneum (progressive) ; tibia with 

 twisted shaft and cnemial spine ; tibio-astragalar facet flat, 

 obliquely placed ; calcaneo-cuboidal facet very oblique ; large 

 astragalo-cuboidal facets ; external calcaneal tubercle large (as 

 in many Creodonts and Amblypods). 



