CEEODONTA. 315 



sagittal crest, and the supeiior walls of the cranium are massive. The 

 crest divides on the posterior part of the frontal region, and disappears. 

 The z_ygomata are short and deep, and laterally expanded. The malar 

 bone rises in a strong postorbital process, partially inclosing the orbits, as 

 in the Cats. The angle of the mandible is not inflected in the least degree. 



The scapula has a well-developed coracoid hook. The spine rises 

 abruptly from near the glenoid fossa. The tuberosities of the hume- 

 rus are not very prominent, and are separated by a rather wide bicip- 

 ital groove. The deltoid crest is continuous with the edge of the greater 

 tuberosity and is quite prominent. At the distal extremity there is an 

 epitrochlear foramen. The condyle has the internal flange and external 

 cylinder of carnivorous mammalia, the cylinder with a deep notch on the 

 posterior inferior face, the inner border of the notch continuing into a flange 

 on the posterior side. The epicondyles are not so much expanded as in the 

 species of Stypolophus and other forms of Creodonta. The head of the 

 radius is a regular transverse oval. The only irregularity is a slight con- 

 cavity of the superior border. The face is gently concave, with a point 

 directed proximad on the superior border. The carpal extremity of the 

 radius is triangular. The surrounding tuberosities are distinct. The carpal 

 extremity of the ulna is somewhat like the head of a rib in its obliquity and 

 its distal and lateral tuberosities. But few bones of the fore foot are pre- 

 served. The most important is the cuneiform, which difiers much from that 

 of the Carnivora, but resembles that of Estlionyx. It is flat and not oblique. 

 The unciform facet is concave, and about as large as each of the two supe- 

 rior facets. The latter are transverse and subequal, and are little concave, 

 and are separated by an obtuse ridge. The bone resembles the cunei- 

 form of Ursus more than that of Proci/on, and still less those of Canis and 

 Felts. It differs from Ursus in its less obliquity and its external production 

 into a tuberosity. The proximate ends of the first, second, and fifth meta- 

 carpals are a good deal like those of Ursus, but the trapezial facet of the 

 pollex is more concave in the transverse direction than in that genus. 



In a fragmentary skeleton of probably 0. morsitans a portion of the 

 ilium is preserved. It exhibits a tuberosity above the acetabulum which 

 represents the " anterior inferior spinous process" of human anatomy, and 

 is larger than in the existing genera Ursus, Canis, and Felis. The ischium 



