354 



Annals of the South African Museum. 



Of the other elements of the carpus the radial centrale is lost, the 

 4th carpale is in position, the 3rd only slightly displaced, and the 1st 

 is in apposition with the 1st metacarpal, but displaced from the 

 radiale. What is believed to be the 2nd carpale, but may possibly 

 but much less probably be the radial centrale, is present but dis- 

 placed. There is evidence of a lost 5th carpale. The metacarpal 

 and 1st phalanx of the pollex is present, and a metacarpal which is 

 probably that of the 2nd digit. 



The 4th carpale is a moderate size element ; but the upper surface 

 is smaller than that of the 2nd centrale, measuring 38 mm. by 26 mm. 



LEFT CARPUS AND ADJOINING BONES OF Pareiasanrus. 



The distance between the palmar and dorsal surface is about 

 37 mm. 



The 3rd carpale is very narrow and deep. Its greatest width is 

 30 mm. and its depth 40 mm. The greatest measurement between 

 the proximal and distal surfaces is 24 mm. 



The element which is almost certainly the 2nd cai'pale is 42 mm. 

 in width, 51 mm. in depth, and 30 mm. between the proximal and 

 distal surfaces. The upper surface is reduced to a minimum while 

 the under surface is flattened and doubtless bore part of the 

 weight. 



The 1st carpale has a fairly large upper surface and a small 

 flattened lower surface. The greatest width of the bone is 47 mm. 

 and the depth 40 mm. The distance between the proximal and 

 distal surfaces is 32 mm. 



