EXPLANATION OF PLATES. 



Plate 1. 



Ventral view of skull of Megaptera miocaena. Cat. No. 10300, U.S.N.M., Vert. 

 Palaeon. Type. The right periotic lies in its normal position. The right 

 supraorbital fragment is not placed in its correct position in this plate. 



Plate 2. 



Diagrammatic outline drawing of ventral view of skull of Megaptera miocaena. 

 The right side has been restored to show approximate outlines of the missing 

 parts. 



Plate 3. 



Dorsal view of skull of Megaptera miocaena. Cat. No. 10300, U.S.N.M., Vert. 

 Palaeon. Type. 



Plate 4. 



Lateral view of skull of Megaptera Miocaena. (^fit. No. 10300, U.S.N.M., Vert. 

 Palaeon. Type. 

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