4. Type-skull. Bering Island. Cat. No. 20992, U.S.N.M. Posterior aspect.

All figs. about 1/10 nat. size.

[Illustration: Plate 29 SKULLS OF BERARDIUS BAIRDII]

_Berardius bairdii._

Figs. 1-4. Bering Island. Young. Cat. No. 142118, U.S.N.M.

5. Skull. St. George Island, Alaska. Male, immature. Cat. No. 29727,

U.S.N.M. Posterior aspect. 1/10 nat. size.

[Illustration: Plate 30 MANDIBLES OF BERARDIUS BAIRDII]

Mandibles of _Berardius bairdii_.

Fig. 1. Bering Island. Young. Cat. No. 142118, U.S.N.M.