2. The same specimen. Sternum. Ventral aspect. About 1/7 nat. size.

3. _Hyperoödon ampullatus._ Newport, Rhode Island. Acad. Nat. Sci.

Philadelphia.

[Illustration: Plate 33 SKELETON OF BERARDIUS BAIRDII]

Fig. 1. _Berardius bairdii._ Atlas. St. George Island, Alaska. Female,

adult. Cat. No. 49726, U.S.N.M. Anterior surface. 1/7 nat. size.