Plate 21 SKULLS OF ZIPHIUS CAVIROSTRIS

Ziphius cavirostris.

Fig. 1. Skull. Newport, Rhode Island. Lateral aspect. 1/7 nat. size.

2. Skull. (Type of Ziphius semijunctus (Cope).) Charleston, South Carolina. Posterior aspect. 1/7 nat. size.

3. Skull. Barnegat City, New Jersey. Posterior aspect. 1/7 nat. size.

4. Skull. (Topotype of Ziphius grebnitzkii Stejneger.) Posterior aspect. 1/7 nat. size.

5. Skull. Newport, Rhode Island. Posterior aspect. 1/7 nat. size.