Plate 19 SKULLS OF ZIPHIUS CAVIROSTRIS

Ziphius cavirostris.

Fig. 1. Skull. (Type of Ziphius grebnitzkii.) Bering Island. Cat. No. 20993, U.S.N.M. Ventral aspect. ⅙ nat. size.

2. Skull. Newport, Rhode Island. Ventral aspect. ⅙ nat. size.