Peterson: Material Discovered in Uinta Basin. 47 



tion that I originally referred them to the same individual. However, 

 when compared with Livniocyon verus described by Dr. Matthew 

 {Mem. Amer. Mus. Nat. Hist., Vol. IX, Part VI, 1909, pp. 433-447) 

 the differences are not so great, the limb-bones of the present specimen 

 being perhaps somewhat smaller in proportion. 



The pelvis is represented by fragments of the ilia and the ischium. 

 The fragments indicate that the pelvis was quite elongated and narrow. 

 The ilium is suddenly expanded at the contact with the sacrum, espe- 

 cially along the superior border, and the great sacro-sciatic notch is 

 short. Immediately anterior to the acetabulum are heavy rugosities 

 for muscular attachments. The ischium has a considerable inward 

 twist when the pelvis is placed in position; the shaft is rather com- 

 pressed laterally and the ischial spine is located well back of the aceta- 

 bulum, similar to, though relatively of smaller size than in Tritem- 

 nodon agilis Matthew. 



The femur is quite complete and presents characters much in 

 accord with Limnocyon verus. The distal end appears to be somewhat 

 broader than in the latter species, which may, however, be partly due 

 to crushing. The upper end of the shaft has an inward turn similar 

 to that in Limnocyon verus; the lesser trochanter is possibly located 

 somewhat more posteriorly than in the latter species, but the third 

 trochanter is approximately in the same position and of the same 

 proportionate size. Distally the bone is, as already stated, broadly 

 expanded, which is in part, at least, due to crushing. However, the 

 rotular trochlea appears to be proportionally broader than in Lim- 

 nocyon verus. Above the external condyle on the postero-fibular angle 

 is a curious deep groove in the neighborhood of the attachment for 

 the gastrocnemius. The intercondyloid notch is quite broad. 



The tibia and fibula are poorly represented. It is, however, plain 

 that the shaft of the fibula is quite stout and oval in cross-section. 



Both calcanea are represented with the greater portion of the 

 tuber calcis broken off. The bone is rather small, not much expanded 

 laterally, due to the small development of the lesser process. The 

 groove for the interosseous ligament is quite broad, as in many recent 

 FercB, but the bone as a whole is perhaps most suggestive of the 

 Miacince. The peroneal tubercle is large, with the tendinal groove 

 for the peroneus longus fairly well developed. The facet for the 

 cuboid is oblique and on the plantar face is a truncated tuberosity for 

 muscular attachment. 



