8 



BULLETIN "3, 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 represents another species (see p. 9). 



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



Measurements. 



Totallength 



Length ot rostram 



Tip of beak to end of ptery- 

 goid 



Height from vertex to ptery- 

 goid 



Breadth between orbits 



Breadth between zygo- 

 matic processes 



Breadth at maxillary 

 notches 



Breadth ol beak at middle... 



Depth of beak at middle 



Greatest breadth of pre- 

 maxilltD proxinially 



Greatest breadth ol pre- 

 maxilla3 in front of ante- 

 riornares 



Greatest breadth of anterior 

 nares 



Length ot temporal fossae 



Breadth between temporal 

 fOSSiE 



Breadthofforamen magnum. 



Length of mandible 



Length of symphysis 



Greatest depth of mandible. . 



Nan- 

 tucket 

 Massa- 

 chu- 

 setts, 



imr, 



M.C.Z. 

 female ? 

 adult, o 



mm. 

 l>7(i5-(- 

 6 483+ 



M607+ 



277 

 e277 



184 

 42 

 35 



54 

 90 



222 



50 



C651 



237 



106 



Scot- 

 land. 

 1872, 



Turner 

 female 



young.? 



mm. 

 749 



572 



241 



286 



292 



197 

 51 



tl 470 

 241 



114 



Fa;o. 

 Nor- 

 way, 

 1895. 

 Grieg 

 female? 

 young. 



mm. 

 620 

 400 



/254 



262 



170 



38 



»31 



115 



''104 

 53 



843 



162 

 92 



Shet- 

 land, 

 1881. 



Turner, 

 male 



adult. 



ram. 

 743± 



254 

 267 



292 

 184 



Rug- 



sund, 

 Nor- 

 way. 

 1901. 



Grieg, 

 male 



adult. 



267 

 292 



295 

 193 



Udslre 

 Nor- 

 way, 

 1869, 



Malm, 

 male 



(No.l). 



mm. 

 733 

 485 



272 



293 



298 



187 

 36 



116 129 



108 

 53 



49 



116 



108 

 50 



56 

 639 

 212 



no 



Vanhol- 

 men, 



Sweden, 

 1881, 



Malm, 

 male 



(No. 2). 



mm. 

 740 

 500 



258 

 253 



270 



170 

 46 



124 



100 

 60 



54 

 640 

 220 



Lande- 

 na;s, 

 Nor- 

 way, 

 1895, 

 Grieg, 

 male. 



mm. 

 660 

 410 



235 

 /260 



268 



175 

 40 

 A 33 



122 



'176 



50 

 "66 



560 

 160 

 95 



M. den- 

 siros- 

 tris (?). 



o The size of the teeth makes it quite certain that it is an adult female. 



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



c Right side. -Vdd 31 mm. for breakage. 



<* In median line. 



« At middle. 



/Between "suprafrontal processes of max." 



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



» From Grieg's fig., p. 18. 



< " Length of ramus." Length of mandible— 699 mm. 



'In Trans. Roy. Soc. Edhiburgh, vol. 26, 1872, p. 776. 



Annis- 

 quam, 

 Massa- 

 chu- 

 setts, 

 1898, 

 True, 

 female 

 young. 



mm. 

 C622 

 c377 



fd466 



248 

 [278] 



266 



[166] 

 38 

 51 



39 

 82 



208 

 46 



