Plate 18 SKULLS OF ZIPHIUS CAVIROSTRIS

Ziphius cavirostris.

Fig. 1. Skull. (Type of Ziphius semijunctus (Cope).) Charleston, South Carolina. Ventral aspect. ⅙ nat. size.

2. Skull. Barnegat City, New Jersey. Ventral aspect. ⅙ nat. size.