350 THE WASATCH AND BRIDGER FAUN^. 



are opistlioccelous with shallow cups, and the centra are quite concave 

 laterally and inferiorly. The centra of the lunibars are more truncate, with 

 a trace of the opisthocojlous structure, and are quite depressed in form. 

 The median part of the series is more elongate than in the corresponding 

 vertebrfe of the genus Canis. They exhibit an obtuse median longitudinal 

 angle, on each side of which, at a little distance, a nutritious artery entered 

 by a foramen. The zygapophyses of the posterior lumbars have inter- 

 locking articulations, the posterior with a convex exterior articular face, the 

 anterior with a concave interior one. The sacrum is not completely pre- 

 served; three coossified centra remain. These are more elongate, and the 

 diapophyses have less expansion than in Fells, Hycena, Cants, or TJrsus. 

 They are much flattened, and the middle one has two slight median longi- 

 tudinal angles. The caudal vertebrae indicate a long tail, with stout base. 

 Its proximal vertebrae are depressed, and with broad, anteriorly directed 

 diapophyses The more distal vertebrae have subcylindric centra ; the ter- 

 minal ones are very small. 



The bones of the fore limbs of the M lanius are stout in their propor- 

 tions. The humerus has a well-mai'ked rugose line for muscular insertion 

 on its posterior face, but no prominent angle. Distally the inner and outer 

 condylar tuberosities are almost wanting, and there is neither external ali- 

 form ridge nor internal arterial foramen. The olecranar and coronoid fossae 

 ai'e confluent, forming a very large supracondylar foramen. The condyles 

 are moderately constricted medially, and there is a well-marked submedian 

 rilj separated from the outer condyle by a constriction. The latter is con- 

 tinued as an acute ridge on the outer side of the olecranar fossa. The 

 inner condyle is the more prominent, and its outer margin is a sharp elevated 

 crest. The ulna has a very prominent superior process, continuing the 

 cotylus upwards. The coronoid process, on the other hand, is rather low. 

 The radial cotylus is flat and broad. The distal end is not preserved. The 

 radius has a more transverse head than Canis or Felis, and has three articu- 

 lar planes, the inner being a wide oblique truncation of the edge. The shaft 

 is angulate below, and becomes a little deeper than wide near the distal 

 end. The extremity is lost. The carpal bones are probably all jirescnt 

 The fore foot was found in place so that the relations of the bones are 



