BEAKED WHALES, FAMILY ZIPHIID^ TRUE. 87 



Plate 2(1 . 

 Berardius bairdii. 



Fig. 1. Type-skull. Bering Island. Immature. Cat. No. 20992, U.S.N.M. Dorsal aspect. About 

 -jxj nat. size. 

 Frontals and zygomatic processes somewhat defective. 



2. Skull. St. George Island, Pribilof Group, Alaska. Female, adult. Cat. No. 49726, U.S.N.M. 



Dorsal aspect. About ^^ nat. size. 



3. Skull. Centerville, California. Male (?), adult. Cat. No. 49725, U.S.N.M. Dorsal aspect. 

 All figs, about YJs fat. size. 



Plate 27. 



Berardius hairdii. 



Fig. 1. Type-skull. Bering Island. Immature. Cat. No. 20992, U.S.N.M. Ventral aspect. 



2. St. George Island, Alaska. Female, adult. Cat. No. 49726, U.S.N.M. Ventral aspect. 



3. Centerville, California. Male (?), adult. Cat. No. 49725, U.S.N.M. Ventral aspect. 

 All figs, about pj nat. size. 



Plate 28. 



Berardius bairdii. 



Fio. 1. Skull. St. George Island, Alaska. Female, adult. Cat. No. 49726, U.S.N.M. Lateral aspect. 



2. Skull. Centerville, California. Male (?), adult. Cat. No. 49725, U.S.N.M. Lateral aspect. 



3. The same skull. Posterior aspect. 



4. Type-skull. Bering Island. Cat. No. 20992, U.S.N.M. Posterior aspect. 

 All figs, about Yo "^t. size. 



Plate 29. 



Berardius bairdii. 



FiQS. 1-4. Bering Island. Young. Cat. No. 142118 U.S.N.M. 



5. Skull. St. George Island, Alaska. Male, immature. Cat. No. 29727, U.S.N.M. Posterior 

 aspect. Yu i^t- size. 



Plate 30. 



Mandibles of Berardius bairdii. 



Fig. 1. Bering Island. Young. Cat. No. 142118, LT. S.N. M. 



2. St. George Island, Alaska. Male, immature. Cat. No. 49727, U.S.N.M. 



3. Bering Island. Adult. (From mounted skull.) 

 Dorsal aspect, yh i^^t. size. 



Plate 31. 



Mandibles of Berardius bairdii. 



Fig. 1. Bering Island. Young. Cat. No. 142118, U.S.N.M. 



2. St. George Island, Alaska. Male, immature. Cat. No. 49727, U.S.N.M. 



3. Bering Island. (From type-skull.) Immature. Cat. No. 20992, U.S.N.M. 



4. Centerville, California. Male (?), adult. Cat. No. 49725, U.S.N.M. 



5. Bering Island. Adult. (From mounted skull.) 



Lateral aspect, rj nat. size. 



Plate 32. 



Berardius bairdii. 



Fig. 1 Vertebra;. St. George Island, Alaska. Female, adult. Cat. No. 49726, U.S.N.M. The 

 vertebrae from left to right are as follows: 1-3 cervicals, 1st thoracic, 8th thoracic, 9th thoracic, 

 10th thoracic, 1st lumbar, 1st caudal. 



2. The same specimen. Sternum. Ventral aspect. About ! nat. size. 



3. Ryperoodon ampullatus. Newport, Rhode Island. Acad. Nat. Sci. Philadelphia. 



