AM. JOUR. SCI., Vol. XXI, 1881. Plate XVIII. 
Pelvis of Brontosaurus excelsus, Marsh, seen from the left; one-sixteenth 
natural size; a, acetabulum; /, foramen. in pubis; 7, ilium; is, ischium ; 
P, pubis. ; 
‘In this diagram, the three pelvic bones are represented nearly in the 
lan 
Same 
