12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 68 



Plate ii 



Upper figure, Lipotes vexillifer, type. Cervical vertebrae from the left side 



(about X -57) • 

 Lower figure, Inia geoffrensis. No. 49852, U. S. Nat. Mus. Cervical vertebrae 



from left side (about X -57) • 



Plate 12 

 Lipotes vexillifer, type. Cervical vertebrae, anterior surface (about X -63). 



Plate 13 



Inia geoffrensis. No. 49582, U. S. Nat. Mus. Cervical vertebrae, anterior surface 

 (about X.63). 



