AM. JOUR. SCI., Vol. XXI, 1881. Plate XIll. 
Figure 1 ee — > Brontosaurus sana aig Baio view ; one- 
ul 
sixteenth natural s , scapula; ¢, d; oid cavity ; 08 
right ioe — oe lott sternal one rie cart rile as 
Ficure 2.—Left sternal bone, pei. a natural size; a, superior view ; }, 
inferior ion. ie ace for argin next to median line; e, 
inner front ae P ; Ssaleae a nt 
FIGURE csieagaite r are. si As young Rhea Americana, Lath; (after Parker); 
three-fourths natural : size; seen from below. Letters as above 
