334 TOE ITEKCO FAUNA. 



-width is equal, and in both the external side is more oblique than the inter- 

 nal. Both have a notch at the middle of the internal side, but they differ 

 in that the third has an open notch on the external side which is wantinj,'- 

 ti> the fourth. The lateral excavations of the external sides are deep and 

 rather large, and thin out the anterior external edge. The lateral facets 

 are corresponding!}- large on the fourth and fifth; on the third metatarsal 

 it is small, and a mere decurvature of the proximal surface. That of the 

 fourth is loiigi-r proximo-distally thiiii transversely. That of the fifth is 

 about as long as wide, and presents more anteriorly; or, to express it more 

 accurately, the shaft and head present more outwardly than those of the 

 fourth. The jiroximal, or cuboid facet is narrow anteroposteriorly, and is 

 curved, the external side being concave. On the external side just distal 

 to this facet the head of the Ijone expands into a large outward-looking 

 tuberosity, which is separated from the posterior tuberosity by a strong 

 notch. Between it and the head projier, on the anterior face, is a large 

 fossa. The entire form is something like that of the proximal extremity of 

 a femur with head, neck, great trochanter and trochanteric fossa. A some- 

 what similar form is seen in the corresponding bone of Oxi/cena forcipata. 

 The shaft of the fifth metatarsal is one-fifth longer than that of the second 

 metacarpal (? 3d) above described. Its direction is straight, but it is some- 

 what curved anteroposteriorly. Its section is subtriangular, the apex 

 external. The condyle is narrowed and subglobular above, and spreads 

 lateral!}' behind, the external expansion being wide and more oblique. T|ie 

 keel is prominent, and is only visible from above (in front) as an angle. 

 The distal extremities of some other metatarsals diff"er in being flatter at 

 the epicondyles and concave Ijetween them on the posterior face. The con- 

 dyles are more symmetrical, and are bounded above on the anterior face by a 

 jjrofound transverse groove. Several phalanges are preserved, including part 

 of an unguis. They are all depressed, nm! with well-marked articular sur- 

 faces, of which the distal are well grooved, and the proximal notched below. 

 The lateral areas of insertion of the tendons of the flexors are well marked 

 on the edges of tlie po.sterior faces. An ungual phalange is much com- 

 pressed at the base. The basal table is well marked, and has a free lateral 

 edge. The nutritive foranuMi enters above- the posterior extremity of this 

 edge. No trace of basal sheath. 



