TABLE A. 



33 



the supposition that they are taken from a single individual, it is instructive to note 

 that the ratio of the ulna to the humerus is 136, which is only a trifle greater than the 

 ratio of the corresponding bones of Professor Marsh's type of P. ingens, No. 1175. In 

 all other examples of Pteranodon in the Yale Collection, the length of the ulna is still 

 greater in comparison with that of the humerus. 



TABLE A. 

 Lengths of long bones of the wing and leg in millimeters. 



