Plate 17 SKULLS OF ZIPHIUS CAVIROSTRIS
Ziphius cavirostris.
Fig. 1. Skull. (Topotype of Ziphius grebnitzkii.) Bering Island. Male (?), adult. Cat. No. 21248, U.S.N.M. Dorsal aspect. ⅙ nat. size.
2. Skull. Newport, Rhode Island. Male, adult. Cat. No. 49599, U.S.N.M. Dorsal aspect. ⅙ nat. size.