ART. 14. MARYLAND FOSSIL PORPOISE— KELLOGG. 39 



Plate 16. 



Ribs of Zarhachis fiagellator Cope, Right side. About Vs natural size. Fig. 

 1, First rib ; 2, Second rib ; 3, Fourth rib ; 4, Fifth rib ; 5, Sixth rib ; 6, Ninth 

 rib ; 7, Tenth rib. 



Plate 17. 



Posterior caudal vertebrae of Zarhachis flagellator Cope. About % natural 

 size. Figs. 1-3, Inferior views of caudals; 4-6, Superior vievs^s of caudals. 



Plate 18. 



Figs. 1-4, Chevrons of Zarhachis flagellator Cope, Lateral view ; 5-7, Caudal 

 vertebrae of Zarhachis flagellator Cope, Anterior view.s. All figures about % 

 natural size. 



