1873.] 1 J J [Cope. 



have interlocking articulations, the posterior with a convex exterior 

 articular face, the anterior with a concave anterior one. The sacrum 

 is not completely preserved, three coossified centra remain. These are 

 more elongate and the diapophyses have le6s expansion than in Felis, 

 Hycena, Canis or Ursus. They are much flattened, and the middle one 

 has two slight median longitudinal angles. The caudal vertebra? in- 

 dicate a long tail, with stout base. Its proximal vertebrae are depressed, 

 and with broad anteriorly-directed diapophyses. The more distal verte- 

 bras have sub-cylindric centra ; the terminal ones are very small. 



The glenoid cavity of the scapula is shallow ; the coracoid process is a 

 short hook separated by a strong groove from the edge of the former. 

 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 radius, less than in Felis or Canis. 

 Its humeral glenoid face is more convex transversely in its anterior or 

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

 In the hind limb the femur resembles that of other Camivora in all 

 essentials. The rotular groove is narrow and elevated, the inner margin 

 a little higher. The condyles are rather narrow, the inner with less 

 transverse and antero-posterior extent, and separated by a wide and 

 deep fossa. The patella is narrow, thick, and truncate at one end. The 

 proximal end of the tibia exhibits a very prominent and well elevated 

 crest or spine, which bounds a deeply excavated fossa. The articu- 

 lar faces are separated by a deep notch behind ; the external is a 

 little the larger and is produced into a point outwards and backwards ; 

 it lacks the notch of the antero-exterior margin so distinct in Canis, but 

 possesses an emargination at the outer base of the crest homologous 

 with it. The general form is, however, more like that of Canis than of 

 Felis, and least like that of Ursus. The distal extremity of the tibia 

 presents Carnivorous characters. The two trochlear fossae are deeply 

 impressed, the outer wall of the external one being formed by the fibula 

 only. The anterior marginal crest is more elevated than the posterior, 

 and presents an overlapping articular face between the fossae for a cor- 

 responding tuberosity of the neck of the astragalus. The inner malleolus 

 is entirely without the groove for the tendon of the tibialis posticus 

 muscle, and therefore different from many of the digitigrade Camivora. 

 It has an ovate truncate surface. On the anterior face opposite the 

 inner trochlear groove is a rather small but deep fossa. 



The astragalus has an elongate oblique neck and a navicular extremity 

 slightly expanded inwards. The trochlear ridges are well elevated, and 

 not very oblique to the true vertical plane, being much as in the dog. 

 The distal extremity is quite different from Felis, Hycena, Canis and 

 Ursus in having a rather narrow convex facet next the cuboid bone ex- 

 tending from front to rear, and in having the navicular facet pulley-like 

 or slightly concave in transverse section, while it is strongly convex 

 antero-posteriorly. This is part of the peculiarity presented by the 



