68 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 76 



PLATE 7 



Lateral aspect of skulls of highly modified toothed cetaceans, figs. 2, 3, 4, 

 compared with that of a normal mammal, fig. i. 



Fig. I. Cynogale. No. 145587, U. S. Nat. Mus. 



Fig. 2. Stcnodelphis. No. 49494, U. S. Nat. Mus. 



Fig. 3. Kogia. No. 22015, U. S. Nat. Mus. 



Fig. 4. Hyperoodon. No. 14499, U. S. Nat. Mus. 



I 

 I 



I 



