PLATE XXXII. 



ODONTOBNITHES. 

 Pelvis of Apatoenis and Ichthyornis. 



Twice Natural Size. Page. 



Fig. 1. — Pelvis of Apatornis celer Marsh ; lateral view, seen from the right, 164 



il — Hium. 



is — Ischium. 



pb — Pubis. 



of— Acetabular foramen. 



a — Ischio-sciatic interval. 



b — Obturator interval. 



Fig. 2. — Pelvis of Ichthyornis victor Marsh ; superior view, _.. . . . 163 



il — Ilium. 

 is — Ischium. 

 pb — Pubis. 

 s —Sacrum. 



Fig. 3. — Pelvis of Ichthyornis victor ; inferior view, 163 



s — Sacrum restored in part from sacrum of Ichthyornis dispar, (PI. XXII, fig. 7.) 



