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.
Plate 20 SKULLS OF ZIPHIUS CAVIROSTRIS
Ziphius cavirostris.
Fig. 1. Skull. (Type of Ziphius semijunctus (Cope).) Charleston, South Carolina. Cat. No. 21975, U.S.N.M. Lateral aspect. ⅙ nat. size.
2. Skull. Barnegat City, New Jersey. Lateral aspect. ⅙ nat. size.
3. Skull. (Type of Ziphius grebnitzkii Stejneger.) Bering Island. Cat. No. 20993, U.S.N.M. Lateral aspect. ⅙ nat. size.