‘ 
AM. JOURN. SCI., Vol. XIX, 1880. Plate XI 
e 1.—Dermal plate of Stegosaurus wngulatus, Marsh; a, superior view; b, 
ni side view ; c¢, inferior view. 
gure 2.—Dermal plate of same animal; * “ers view; }, end view of base; ¢, 
sia of opposite side; d, thin margin; e, rugose e base; f, and /’, surface 
Fi arked by vascular grooves. 
igure spe plate of same animal; a, superior surface; 0, thick basal 
Margin ; ¢, weer surface; oth letters as in last figure. 
oO 
the figures are one-twelfth natural size. 
Ie aera OTS ara ne Ea MU gE MRR PR ate 
