CREODONTA. 331 



are two other separated zygapophyses of smaller size, which have but slightly 

 convex surfaces. One is probably a prezygapophysis of a dorsal vertebra. 

 No centrum is preserved. 



Of the anterior limb there is a probable distal half of a radius. It is 

 of peculiar form, and resembles that of SarcophUns nrsinus more than any 

 other species accessible to me. One peculiarity consists in the outward look 

 of its carpal sui'face, which makes an angle of about 4 j^ with the long axis 

 of the shaft. The obliquity in S. ursinus is less. The external border of the 

 shaft in M. ferox is, however, straight, and terminates in a depressed tuber- 

 osity. Beyond this, the border extends obliquely outwards to the carpal 

 face, which it reaches at a right angle. The internal border of the shaft is 

 gradually curved outwards to the external border of the carpal face. Its 

 edge is obtuse, while the external one is more acute for a short distance, 

 and rises to the anterior (superior) plane of the shaft. The carpal face is 

 spherically subtriangular with rounded angles. It displays two slightly 

 distinguished facets, one of which is superior, and the other is larger and 

 surrounds it, except on the superior side. The internal marginal projection, 

 or "styloid process," is not so prominent as in S. ursinus, and is a roughened 

 raised margin. Joining it on the inferior edge of the carpal face is another 

 rough projection of the margin. Immediately opposite this, on the superior 

 edge of the carpal face, is a rough tuberosity, which incloses a small rough 

 fossa, between itself and the styloid process. Internal to it is a shallow 

 groove for an extensor tendon of the manus ; then a low short ridge, and 

 internal to that a wide shallow depression for other extensors. The carpal 

 face differs greatly from those of Sarcophilus and Dklelphys in having the 

 inner portion wider than'the outer, instead of the reverse, and in having no 

 distinct styloid process. It indicates that the manus was turned outwards 

 much more decidedly than in those genera. I have described a bone very 

 similar to this one in the Conoryctes comma, as the extremity of the tibia (p. 

 ), which reference is probably erroneous. 



Of carpal bones the only recognizable one is the unciform. Its proxi- 

 mal articular surface rises with a strong convexity entad, and descends to 

 an edge ectad The metacarpal surface is concave in anteroposterior section, 

 forming a wide shallow groove, extending in the direction of the width of 



