THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 281 
In the following table the measurements of the skull are reduced to percentages 
of its total length and compared with the average measurements of American 
B. physalus already given (p. 133): 
BALAENOPTERA PHYSALUS AND B. VELIFERA ? SKULL. 
East Coast California 
NESE B. Pine skull. 
Veiall lena Of Stille ocadene daq0 se oboossoc nooo soouUOdOOgS 100 % 100 % 
% % 
(Granies(h DREGE. 5 od oto hoe aed Seton ocd beaten Occ Casco arCecees 47.1 48.0 
Bucadtivot orbital border Of roma t che rel erieis eters ey= ie «<ie/~ 2). | 10.6 10.3 
LGM We. Ol MOSM © so ognoadonto wHde sD oCosME Ooms ComadEae 67.2 69.1 
BREA ton mOstnum acim lesa aera cco eneists ces citeeictensics tha a =e 19.6 21.4 
Wencwhvorentan di blesimes trate mtglin errs set4 elise cf e.esel- 93-9 94.8 
Depenotmeanciblevariume middlemen aprtssci <li eiets oe « 6.7 7.0 
The correspondence in proportions between the East and West Coast skulls is 
close, except that the California skull has a somewhat longer and broader beak than 
the average East Coast specimen. In these respects it is, however, below the maxi- 
mum of B. physalus, as will be seen by consulting the table on p. 133. 
It should be stated also that as the premaxillee were not in place in the Cali- 
Fic. 95. Fic. 96. 
BALAENOPTERA VELIFERA COPE? CALIFORNIA. 
Fic. 94.—SKULL. FIG. 95.—CERVICAL AND DorsAL VERTEBR&. Fic. 96.—LUMBAR VERTEBR&, FROM 
BELOW, (WISTAR INSTITUTE, PHILADELPHIA.) 
fornia skull when measured, an allowance had to be made for their extension beyond 
the maxillz. This amount (74 in.) may have been a trifle too great. 
By reference to the measurements of Atlantic skeletons of B. physalus given 
on page 144, it will be found that the average breadth of the scapula is 26.4 % of 
the length of the skull, while in the California skeleton it is 26.0%; the average 
depth of the scapula in the Atlantic skeletons is 15.9% and in the California specimen 
