224 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



degree of rotation, much less than in T)(q)h<mins or Felis^ about as in 

 Canl><. The coronoid process is less prominent than in Ilycexodon^ 

 much less than in Dapha'iniK or Feli><, somewhat more than in Cauls. 

 The distal end of the radius likewise resembles Hyoenodon and diifers 

 widel}' from Daj^hamus and the Felida% nmch less from the Canida?, 

 in the convex posterior surface, the slii>-ht development of the styloid 

 process (moderately strong in the dogs, remarkably strong in Daphoe- 



nus) and many details of 

 form and arrangement of 

 the processes and tendinal 

 grooves. 



Forefoot' — The entire car- 

 pus except the trapezoid 

 and trapezium, the greater 

 part of three metacarpals, 

 and most of the phalanges 

 arc prescr\ ed. The carpus 

 lias the usual crcodont char- 

 acters of separate scaphoid, 

 lunar, imd centrale, small 

 nuignum, large unciform 

 and cuneiform, etc. The 

 centrale is of moderate size, 

 and lies principally imder 

 the scaphoid, 1)ut toward the 

 dorsal surface projects con- 

 siderably under the luivar 

 so that its small exposure 

 on the dorsal face of the 

 Hr carpus lies equally beneath 



Fig. 17. — Sinopa grangeri fore foot, nat. size, dorsal scinhoid 'Uld luU'ir 

 VIEW, ce, centrale; can, scaphoid: lu, lvnar; maci, \^ • i • i u 



MAGNUM; ;/iS, pisiform; SC, CUNEIFORM; td, TRAPEZOID; ihCCarpUS IS UlglU^r tUan 



tm, trapezium; unc, unciform. The dorsal surface jj^ ITiKPUodon l)Ut the bonCS 



OF THE MAGNUM IS REPRESENTED CONSIDERABLY TOO * ' L I J 



LARGE, AND THE PROXIMAL FACET OF THE LUNAR IN- lUive tiie saHie rattier oroaQ 

 (ORRECTLY DEFINED SO THAT IT APPEARS TO EXTEND souarc charactcr commoD 



OVER THE WHOLE DORSAL SURFACE OF THE HONE. ^ . , 



to Hytenodonts, Oxyanuds, 

 and Mesonj'chids, which the writer has elsewhere explained as par- 

 alleling the ungulates." The scaphoid is of moderate height and is 

 principally supported by centrale and trapezium. The lunar is sup- 

 ported about equally by magnum and unciform. The cuneiform is 



« Wortman, in criticising thi^ pas.sage, appears to have completely misunderstood 

 my words, and supposed that by "podials" I meant claws! The parallelism with 

 the ungulates does not of course involve relationship, but is due to a similar adapta- 

 tion of the feet to use solely in locomotion. A later and less perfect parallelism in 

 the podials is seen in the Canid;c, taking place after the consolidation of the scapho- 

 lunar-centrale. 



