82 



University of California. 



[Vol. 3 



radius is sharply angular, and the adjacent corner of the ulna is 

 only slightly rounded, while the surfaces of both have been 

 thickly covered with cartilage. The intermedium evidently did 

 not fit closely between the radius and the ulna, but lay near 

 them in a thick plate of cartilage. The form and position of 

 the ossicle just described are such as would be found in the 

 intermedium, and it will be considered as representing that 

 element. The dimensious are about what one would expect it to 

 possess (long diameter 50 mm., short diameter 42, thickness 23). 



Two small ossicles, one of which probably represents a 

 phalanx, were found mingled with the cervical vertebra? and 

 ribs. One of them is similar to the element which has been 

 considered as an intermedium, but is slightly shorter and about 

 one-half as thick. It may be either a distal carpal or a phalanx. 



On the other bone the pi'oximal and distal ends are thickened 

 and convex. One lateral margin is convex, the other deeply 

 concave and considerably thinned. The length is 40 mm., the 

 width 50, the thickness at the ends 20, and in the middle 14. The 

 thinness of the middle portion and the concavity of one margin 

 in this element may indicate the remnant of a shaft of a phalanx 

 with thickened posterior margin and ends. This bone is possibly 

 a part of one of the elements at the back of the skull. 



The hind limbs are known only from the perrini specimen, 

 with which there are present both femurs, a tibia, a fibula, and 

 four small ossicles of doubtful relationships (PI. 6). The tibia 

 and fibula are associated with one of the femurs in such a way 

 that there can be no doubt as to their relation to it. Two of the 

 small bones may also belong with this limb. The other two and 

 the second femur are not definitely connected with any of the 

 other limb bones. 



Compared with the humerus of osmonti and alexandrce the 

 femur is relatively slender. Its length, 55 mm., slightly exceeds 

 its greatest transverse diameter, which is found at the distal 

 extremity. The shaft is considerably contracted in the middle, 

 where its width is only a little more than half of its length. 

 The expanded and flattened distal and proximal ends are twisted 

 away from each other so that their long diameters intersect at 

 an angle of about sixty degrees. The fibular facet is only about 



