Investigation* in South African Fossil Reptilia and Amphibia. 73 



superior process from the expanded portion. The ventral portion 

 of the expanded end is bent inwards and lies below the next 

 succeeding rib. 



Shoulder girdle. Only the upper end of the scapula on each side 

 is seen. The bone is a thin flat blade with an antero-posterior 

 length at its extremity of 75 mm., and with an average thickness of 

 not more than 8 mm. The upper border is approximately straight 

 and posteriorly it is produced, so that the posterior angle is acute 

 while the anterior angle is obtuse. 



The cleithrum differs in shape from that of Eryops. It has a 

 length of at least 210 mm., and is closely applied to the anterior 

 border of the scapular blade and to the outside of the anterior end 

 of the upper border. For at least half of its length it is overlain by 

 the clavicle. It is a strong bone, spatulate at its distal end when 

 viewed from above, and not possessing the fan-shaped expansion 

 seen in Eryops. It extends back beyond the scapula, not in contact 

 with most of the upper border of that bone, and it almost covers the 

 scapula when viewed from above. 



The upper part of the clavicle lies in front of and upon the 

 cleithrum. It is expanded and somewhat spoon-shaped when seen 

 from above, with an inner pointed distal angle. Its maximum width 

 is 46 mm. Proximally it is curved inwards to meet its neighbour 

 beneath the interclavicle, which is not seen ; the proximal portion 

 of the bone is more rounded in cross-section than the distal 

 expanded portion. 



Fore-limb. Of the humeri only the distal ends have been dis- 

 played, and they have been mutilated to a certain extent, so that it 

 is not possible to give any details of their form. 



The radius and ulna of both fore-limbs are lying in position. The 

 radius is a single shaft with slightly expanded ends, 80 mm. long, 

 with a minimum width of shaft of 16 mm. The proximal end has a 

 width of 27 mm., and is hollowed for articulation with the humerus. 

 Tbe distal end has a width of 2-i mm., and has two articulating 

 faces. The inner one is comparatively short, while the ulnar surface 

 is much longer and nearly flat. 



The ulna has a form similar to that figured by Case for 

 Eryops. The olecranon process is very blunt. The radial border 

 of the bone is concave, the outer border straight from the head 

 to the beginning of the distal expansion. The length of the 

 ulna is 82 mm. The outer angle of the distal end is bluntly 

 rounded for articulation with the pisiforme, while the main surface 

 is truncate. 



