19 



Measurements. 



M. 



Length of nine posterior dorsal vertebrie 0.880 



Length of nine sacral vertebrae, (36| inches) 930 



Length of right ilinm, (two pieces, .84x.22) (41 inches) 1.060 



Length of eighth dorsal from sacrum 090 



Length of base of neurapophysis 085 



Depth articular face 153 



Width articular face 123 



Length second from sacrum 070 



Depth articular face 155 



Width articular face 137 



Elevation neural canal 045 



Width neural canal 028 



Elevation to face of zygapophyses 104 



Elevation to base of neural spine 150 



Length diapophysis from lower base 200 



Length from capitular articulation 125 



Antero-posterior width above 050 



Antero-posterior base of neural spine 070 



Antero-posterior width at zygapophysis 078 



Length neural spine, (fragment) 200 



Width centrum, first sacral 160 



Depth centrum, first sacral, (to neurapophysis) 145 



Length centrum, first sacral 100 



Length centrum, seventh sacral 100 



Depth centrum, seventh sacral, (behind) 085 



Width centrum, seventh sacral, (behind) 100 



Expanse second sacral tranverse support, (22 inches) 560 



Length ilium anterior to acetabulum 470 



Length of acetabulum 200 



Length of posterior to acetabulum 390 



Width ilium at anterior extremity 140 



Width ilium at front of acetabulum 210 



Width ilium at posterior expansion 250 



Thickness above acetabulum 060 



Width of acetabulum 105 



Width of basis of ischium 085 



Width of shaft of a rib 062 



Other bones not yet determined will be included in the description in 

 the final report. 



This species was no doubt equal in dimensions to the largest known 

 terrestrial saurian s or mammals. 



HADEOSAUEUS, Leidy. 



Cretaceous reptiles of the United States 1865, p. 76, Proceedings 

 of the Academy of Natural Sciences, Philadelphia, 1856, p. 218. 

 Hadrosaurus MiRABTLis. Leidy. 



Proceedings of the Academy, Philadelphia, 1868, 199. Cope, extinct; 

 Batrachia, etc., 1868, 198. Trachodon mirahilis, Leidy ; Proceedings Acad- 

 emy, Philadelphia, 1856, 72 ; Transactions American Philosophical Soci- 

 ety, 1860, 140. — From the bad lands of Judith Eiver, Montana. Known 

 only from teeth. 



