NOTES ON THE CANIDJ3 OF THE WHITE RIVER OLIGOCESTE. 



393 



slender and delicate, is relatively very much less so than in Cards, in which genus the 

 fibula has undergone a more extensive reduction than in Oynodictis. Another difference 

 from the recent forms is to be found in the fact that the fibula is not so closely applied to 

 the tibia, the two bones coming into contact only at their proximal and distal extremities. 

 The distal end is expanded and thickened to form a stout external malleolus, which is 

 somewhat smaller than in Daphmnus or Dinictis, but of much the same shape, and has 

 on its outer side a deep sulcus for the peroneus tertius tendon. The distal tibial facet is 

 a narrow band, with its long diameter directed antero-posteriorly ; obscurely separated 

 from it is the larger, subcircular facet for the astragalus. 



Measurements. 



Pelvis, length 



breadth at acetabulum 



Ilium, length fr. acetabulum 



" breadth of peduncle 



" " ant. plate 



Ischium, length fr. acetabulum 



Acetabulum, fore-and-aft diameter 



Femur, length 



" breadth of pi ox. end 



" " distal end 



Tibia, length 



" breadth of prox. end 



" thickness of prox. end 



" breadth of distal end 



Fibula, thickness of prox. end 



" " dislal end 



No. 10493. 



No. 11012. 



No. 11381. 



No. 11382. 





?0.064 









.036 



.037 







?.033 



.037 







.011 



.010 



.009 

 .013 





.027 





.026 





.008 



.011 









.096 



.085 





.017 



.020 



.015 





.016 



.017 



.014 





.089 



.099 







.015 



.018 



.014 





.013 



.016 



.012 



.009 



.011 

 .007 



.012 



.009 



.0065 





.009 





No. 11432. 



.086 

 .016 

 .014 



.014 

 .012 

 .009 



VIII. The Pes (PI. XX, Fig. 24). 



The general appearance of the hind foot recalls that of the viverrines. The astra- 

 galus is quite like that of Daphcenus, but with some differences which tend in the direc- 

 tion of the modern Canidce, this bone in Oynodictis standing intermediate in structure 

 between the two extremes, though somewhat nearer to Daphcenus. The proximal or 

 tibial trochlea is but little more deeply grooved than in the latter genus, and is therefore 

 much shallower than in Canis, but its borders have the same clean-cut angularity as in 

 the modern forms, instead of curving gradually into the facets for the tibial and fibular 

 malleoli. In Cams the tibial trochlea is extended over upon the dorsal side of the neck, 

 but this is not the case in either of the White Piver canines. The neck of the astraga- 



