352 THE WASATCH AND BRIDGER FAUN^. 



bat the metatarsals are more elongate. The lengths of the latter are, 

 fifth shortest, then second, third, and fourth. Their condyles are broad, 

 with median keel behind, and shallow supracondylar fossa in front. The 

 first phalanges are about one-third the length of the metacarpals; the 

 second of digit No. 2 broad and stout, and half as long as the phalange of 

 the first row. An ungual phalange has a singular form, so that the claw 

 might be supposed to have a subungulate character. It is flat, consider- 

 ably broader than high and with expanded and obtuse extremity. The 

 articular extremity is depressed and transverse concave in vertical, convex 

 in transverse section. The anterior three-fifths of the superior middle line 

 is occupied by a deep gaping fissure, which separates the extremity into 

 two points. The inferior face is entirely flat, there being no tendinous 

 tuberosity. The sides are grooved, and give entrance each to a large 

 arterial foramen proximally. These claws i-esemble remotely those of seals, 

 and differ remarkably from those of existing terrestrial Carnivora. 



The glenoid cavity of the scapula of ilT. obtusidens is shallow; the coracoid 

 process is a short hook, separated by a strong groove from the edge of 

 the cup. The spine is well developed. In the character of the coracoid, 

 this genus resembles Felis more than Canis or Ursus. The ulna exhibits 

 little trace of articular face for the I'adius, less than in Felis or Canis. Its 

 humeral glenoid face ii;j more convex transversely in its anterior or vertical 

 portion, than in those genera, and a little more than in Ursus. 



Of the hinder limb of the M. lanius, the only characteristic pieces 

 remaining are the navicular, cuboid, and an external cuneiform bone. The 

 cuboid is rather stout, with a slightly concave proximal facet and two distal 

 ones, one of them smaller and sublateral. The navicular is wide and flat, 

 and with a strongly concave astragaline facet. Below, it presents two deep 

 oblique concave facets for the cuneiforms, with a small sublateral one on the 

 outer side. The facets of the cuboid indicate that the fourth digit is well- 

 developed, but the presence of the hallux cannot be positively ascertained. 



In the hind liml) of the M. obtusidens the femur resembles that of true 

 Carnivora in all essentials. The rotular groove is narrow and elevated, the 

 inner margin a little higher. The condyles are rather nairow, the inner 

 with less transverse and anteroposterior extent, and separated by a wide 



