PLATE XXII. 



Jurassic Dinosaurs. — Saueopoda. 



ATL ANTOS A URID^: . 



Page. 

 Fig. 1. Scapular arch of Brontosauru* excehue Marsh; front view; one-sixteenth 



natural size 168 



c, coracoid ; ct, cartilage ; g, glenoid cavity ; oe, right sternal bone ; os', 

 left sternal bone ; s, scapula. 



Fig. 2. Left sternal bone of same individual; one-eighth natural size 168 



a, superior view; b, inferior view; c, face for coracoid; d, margin next to 

 median line; e, inner front margin; p, posterior end. 

 Fig. 3. Sternal plates of young ostrich (Siruthio camelits Linn.); seen from 



below ; two-thirds natural size 169 



c, coracoid; ct, sternal cartilage; 08, ossified sternal bone; sr, sternal rib. 

 288 



