1 82 



THE DESEADO FORMATION OF PATAGONIA 



Atlas, antero-posterior length (without hypophysis) 

 Atlas, greatest width 

 Atlas, height 



Axis, antero-posterior length 

 Axis, greatest width 

 Axis, width of odontoid process 

 Axis, length of odontoid process 



Cervical 3, length of centrum antero-posterior 

 Cervical 3, width of centrum 

 Cervical 3, height of centrum 

 Cervical 3, width of neural canal 

 Cervical 3, height of neural canal 



Cervical 4, length of centrum antero-posterior 

 Cervical 4, width of centrum 

 Cervical 4, height of centrum 



The humerus is flattened from front to back in a striking 

 manner, so that, seen from the side, it looks most slender; 

 while in reality it is a very broad bone, nearly straight, 

 and with marked rugosities for the attachment of the 

 muscles. We found but one specimen of the humerus, an 

 isolated bone a little smaller than that described by Gaudry. 



Specimen Gaudry's 



No. 3218 Specimen 



470 mm. 500 mm. 



232 mm. 232 mm. 



165 mm. 170 mm. 

 61 mm. 



230 mm. 240 mm. 



Humerus, total length 

 Humerus, width at proximal end 

 Humerus, width at middle of shaft 

 Humerus, antero-posterior diam. of shaft 

 Humerus, width across epicondyles 



We found neither the radius nor the ulna, but Gaudry 

 figures both, giving the following measurements. 



Radius, length 

 Radius, proximal diam. 

 Ulna, length (calculated) 

 Ulna, width of olecranon 



245 mm. 



127 mm. 



280 mm. 



140 mm. 



