184 TEETIAET VEETEBEATA OF THE EATtTM. 



EI. 8509. Distal ends of three humeri of similar form to C. 8655. 

 M. 8430. Distal ends of two right humeri. 



C. 8652. Distal end of right humerus of a similar form, but considerably larger size, the width of 

 its distal articular surface being 4'7 cm. against 3'8 cm. in C. 8655. 



M. 8862. Distal part of right humerus. In this specimen there is a supratrochlear perforation. 

 The dimensions (in centimetres) are ; — Width of shaft 3 ; width of distal end 6 ; width 

 of distal articulation 4-5. Presented hy the Egyptian Government, 1904. 



C. 8124. Left radius. This bone is comparatively long and slender, but it widens out considerably 

 towards the distal end. The anterior face of the shaft is convex, the posterior (ulnar) 

 surface flattened. The proximal articular surface consists of a larger outer portion, 

 deeply grooved towards its inner side for the intertrochlear ridge of the humerus, and 

 a smaller inner portion only very slightly concave from before backwards and looking 

 upwards and inwards : this, with the large inner portion of the sigmoid surface of the 

 ulna, articulates with the inner portion of the distal articulation of the humerus. About 

 the middle of the posterior face there is a prominent facet for articulation with the 

 ulna, but in addition to this the whole posterior surface seems to have been ridged 

 and roughened, showing that the union between the two bones was a very close 

 one. The distal articulation is unknown. The dimensions (in centimetres) of this 

 specimen are : — • 



Width of proximal articular surface 4-7 



„ middle of shaft 2-4 



„ distal end 6-3 



Length (without distal epiphysis) 31"4 



M. 9124. Incomplete left radius similar to last. 



M. 8863. Upper portion of a left ulna. The olecranon process is large and rises high above the 

 articulation, but projects very little backwards. The inner border of its upper end is 

 produced upwards into a flange which forms the inner side of a large groove (? for a 

 tendon). The sigmoid notch is shallow and except towards the upper end the surface 

 for the humerus is on the inner side only. There is a small distal surface for the outer 

 side of the humeral articulation, and immediately beneath it is the projecting facet 

 by which the bone interlocks with the upper end of the radius, which must also have 

 been closely united with the rugose anterior face of the shaft. This becomes considerably 

 narrowed towards its middle and is strongly compressed from before backwards, though 

 less so than in Diplopus ; towards the distal end the radial surface forms a sort of shelf 

 on the inner side of the shaft and is bordered externally by a strong rido-e. The 

 distal extremity of the bone is unknown. The dimensions (in centimetres) of this 

 specimen are : — 



Grreatest antero-posterior width of olecranon process .... 5-8 



Height of olecranon above articidation 6-7 



Length of sigmoid notch 4-4 



Width of surface for upper end of radius 3-6 



Presented by the Egyptian Government, 1904. 

 M. 8863a. Upper end of a similar right ulna. Presented hy the Eyypiian Government, 1904. 



