34*2 0. C. Marsh — Restoration of Brontosaurus. 



The figure on Plate XVI, one-ninetieth natural size, is 

 reduced from a. large restoration, one-twenty-fourth natural 

 size, on a lithographic plate accompanying the monograph of 

 the Saurojooda, prepared by the writer for the U. S. Geological 

 Survey. In previous numbers of this Journal will be found 

 various papers by the writer on this group of Dinosauria, and 

 among them, published in August, 1883, is a preliminary 

 outline sketch of the present restoration. 



New Haven, Conn., March 18th, 1891. 



Explanation of Plates. 



Plate XV. — Restoration of Triceratops prorsus, Marsh ; one-fortieth natural size. 



(Cretaceous.) 

 Plate XYI. — Restoration of Brontosaurus excelsus, Marsh; one-ninetieth natural 



size. (Jurassic.) 



