292 



5". II'. WILLISTON 



bones, as usual in such nodules, are white and rather soft, rendering 



their preparation in the 

 hard matrix difficult. It 

 has been worked out so 

 far as was possible 

 without going below the 

 surface of the bones. 



The cadaver had 

 come to rest in a prone 

 position, apparently, 

 with the head and tail 

 directed obliquely up- 

 ward, its vertebrae con- 

 nected throughout in a 

 sinuous curve, and the 

 ribs nearly all in im- 

 mediate connection 

 with their articulating 

 diapophyses. The right 

 humerus had been dis- 

 located, and lay near 

 the posterior end of the 

 right mandible, with its 

 radius a little distance 

 from its distal end . The 

 right femur lay nearly 

 in apposition with the 

 acetabular part of the 

 ilium; its distal part 

 had been eroded away. 

 Doubtless both the front 

 and the hind legs of the 

 left side are buried some- 

 where in the matrix. 

 The remarkable and 



Fig. i.-Trimerorhachis. Specimen No. 1271, wholl >' unexpected fact 

 in original matrix. About one-fourth natural size. disclosed by these Speci- 



