THE WHALEBONE WHALES OF THE WESTERN NOKTH ATLANTIC. 



BALMNOPTEBA PHYSALUS (L.). EUROPEAN AND AMERICAN. SKULL. 



Sex and age 



Total length of whale.. . 

 " " skeleton 



Length of skull (straight). 



Greatest breadth (squa- 

 mosal) 



Breadth of orbital process 

 of frontal at distal end. . 



Length of beak (straight). . 



Breadth of beak at middle 

 (curved) 



Length of nasals ... 



Breadth of 2 nasals at distal 

 end 



Length of mandible 

 (straight) 



Length of mandible 

 (curved) 



Depth of mandible at mid- 

 dle 



wi£f 



3 = 



i ad. 



66' o" 

 straight 



i86" 



% 

 46.2 



O.I 

 71.0 



19 3 

 3.8 



4.0 

 95-2 



7.0 



M P. V 



■06S 



> 



S ad. 

 72' 2" 

 67' 6" 



184" 



52.2 ' 



bow -. 



OS 



S ad. 

 60' o" 



168" 



448 



6g.o 



19.6 

 4-9 



4.2 

 92.S 



7-1 



a^ 



fbetw. 

 50' o ■ 

 and 

 60' o" 



156" 



46.1 



69-3 

 23.1 



z;a 



i 



50' o" 



145.0 



45.8 



10.7^ 

 66.2 



T8.6 



5-2 



5.9 



93-1 



98.6 



6.2 



ad. 



68' 



62' 10' -|- 



194 



48.0 



7.0 



48' o " 



144 



46-5 



6.9 





ti-3 



47 7 



125 



48.0 



10 4' 

 672 



20.0 

 50 



5-2 



94-4 



103.2 



6.4 



jr- 



44.6 



lO.O* 

 66.1' 



21. 9 

 5.6 



5-2 



gt.S 



lOO.O 



7.9 



133 



-ac/i 



'J 3 



1 10. 5 



47.0 



II. 3' 

 65.2 



19.4 

 5-4 



4.9 



BAL^NOPTERA PHYSALUS (L.). EUROPEAN AND AMERICAN. SKULL. 



Measurement. 



American Speci- 

 mens. 



Total length 



Greatest breadth 



Breadth of orbital border of frontal 



Length of beak 



Breadth of beak at middle 



Length of nasals | (4) 



Breadth of nasals | (4) 



Length of inandible in straight line 1 (3) 



Depth of mandible at the middle (2) 



(3) 

 (3) 

 (3) 

 (3) 



lOO.O ^ 



47-1 

 10.6 

 67.2 

 19.6 



5' 



5-5 

 93-9 



6.7 



Nairn, Scotland. 



1 00.0 ! 



45-8 

 10.7 

 66.2 



i8.6 

 5-2 

 5-9 



93- ' 



The agi-eemeut shown in the foregoing measurements is verj'^ close except in the 

 case of the breadth across the squamosals. In regard to this measurement, it must 

 be said that in all specimens of the several species of Balcenoptera it exhibits a 

 considerable range of variation, indicative in part of a real individual variation of 

 considerable extent, and in part, no doubt, to changes in the skulls in drying. 



'7.5 in. added for premaxillae. ■* Least = 5.5 ^. 



' Squamosals pecidiarly broad. See Flower. ' " =7.2^. 



3 Least = 6.9^. ° " =7.2^- 



'Least = 7.2 if. 



'To post, curved margin of maxilla. 

 ' Number of specimens ; the California 

 skull is not included. 



