8 



BULLETIN 73, UNITED STATES NATIONAL MUSEUM. 



The dimensions of the Nantucket skull are given in the following table in 

 comparison with those of seven European skulls of M. bidens. Dimensions of the 

 Annisquam, Massachusetts, skull are also added for purposes of comparison, although 

 it re{)resents another species (see p. 9). 



Dimensions of eight skulls oj Mesoplodon bidens and one slcull of M. densirostris (?). 



o The size of the teeth makes It quite certain that It Is an adult female. 



6 End of beak broken off about 30 mm. from tip. 



<■ Right side. Add 31 mm. for breakage. 



<*In median line. 



'At middle. 



/Between "suprafrontal processes of max." 



Grieg's fig., p. 18, shows 44 mm. 



^ From Grieg's fig., p. 18. 



*" Length of ramus." Length of mandible =099 mm. 



Jin Trans. Roy. Soc. Edinburgh, vol. 26, 1872. p. 776. 



