JUNE, 1901. LIST OF NORTH AMERICAN MAMMALS ELLIOT. 481 



PAGE. 

 27. *Mesoplodon stejnegeri. True 14 



15. fBerardius. 



o o 



22 T" 



Berardius. Duvernoy, Ann. Scien. Nat. Zool., xv, 1851, p. 41. 



Frontal portion'of skull elevated; rostrum, subcylindrical, slen- 

 der, long and narrow; maxillaries slightly swollen and expanded at 

 upper ends; two teeth on each side of the symphysis of lower jaw, 

 the anterior the larger and near the end compressed, triangular, 

 similar but smaller than those of Ziphius. Nasals broad, flattened in 

 front. Mesethmoid partly ossified. 



28. bairdi. {Berardius}, Stejneger, Proc. U. S. Nat. Mus., 1883, 



P- 75- 



Type locality. Stare Gavan, Bering Island. 



Genl. Char. Skull only preserved. "Very low and scarcely in- 

 curved maxillary crests; the shortest distance of which is 223 times 

 greater than their greatest height. * * * The groove between 

 the maxillary and the nuchal crest is very shallow. The maxillary 

 notch is deep. The beak is long, making only little less than half 

 the length of the entire skull. Nares straight; right nasal larger than 

 the left one, but not very much. The occipital condyles do not come 

 in contact beneath the foramen magnum; the symphysis of the lower 

 jaw is very short, amounting to only one-fifth of the whole length of 

 the jaw. Teeth are situated on the tip of the lower jaw." 



Measurements. "Length of skull, 1405; greatest breadth, 698; 

 length from process of supramaxillaries before orbit to posterior edge 

 of condyles, 610; from same process to tip of beak, 890; greatest 

 height of maxillary crests, 86; length of lower jaw, 1292; length of 

 symphysis, 257. Total length of animal about 18 feet." (Stej- 

 neger, 1. c.) 



Fam. III. Delphinidae. 



16. Monodoil. Linn., 1766. 



29. Monodon monoceros. Linn 19 



17. Delphinapterus. Lacdp., 1804. 



30. Delphinapterus leucas. (Pall. ) 19 



* Misplaced on page 14 of the Synopsis. Should go after M. bidens, p. 18. 



t Omitted in the Synopsis. 



J Probably merely a straggler on our Pacific coast. 



