The Beaked Whales of the Family Ziphiidae / An Account of the Beaked Whales of the Family Ziphiidae in the Collection of the United States Museum...

by Frederick W. True

Plate 8 SKULLS OF MESOPLODON EUROPÆUS

Fig. 1. Mesoplodon europæus. Skull. Atlantic City, New Jersey. Male, young. Cat. No. 23346, U.S.N.M. Lateral aspect. About ¼ nat. size.

2. Mesoplodon europæus. Skull. North Long Branch, New Jersey. Female, adult. Mus. Comp. Zoöl. Lateral aspect. About ¼ nat. size.

Distal portion of beak lacking.

Plate 9 SKULLS OF MESOPLODON STEJNEGERI

Fig. 1. Mesoplodon stejnegeri. Type-skull. Bering Island. Immature. Cat. No. 21112, U.S.N.M. Lateral aspect. About ¼ nat. size.

Premaxillæ, maxillæ, frontals, zygomatic process, etc., defective. On account of these defects and the immaturity of the individual the forward inclination of the supraoccipital is much greater than in the skull shown in fig. 2.

2. Mesoplodon stejnegeri. Skull. Yaquina Bay, Oregon. Adult. Cat. No. 143132, U.S.N.M. Lateral aspect. ¼ nat. size.