Plate XXXIII 



ComparatiA'e Series: Lumbar, Sacral, and Coccygeal Vertebrje and Pelvis, Lateral Aspect 

 All figures natural size. 



1. Notharctus osborni. Amer. Mus. No. 11474. Lumbar 1 is supplied from No. 11473. 



2. Lemur mongoz. Amer. Mus. No. 22886. 



3. Cebus apiculatus. Amer. Mus. No. 30200. 



4. Macacm sp. Amer. Mus. No. 41999. 



