AM. JOUR. SCI., Vol. XVII, 1879. Plate IV. 
Left scapula and coracoid of Apatosaurus ajax Marsh; one-fourteenth natural 
size. a. scapular face of glenoid cavity ; 6. rugose su for union with 
coracoid; a’ coracoidean part of glenoid cavity ; 7 foramen in coracol 
