280 



LILLJEBORG ON THE 



Length of processus transversi of the supposed 5th lumbosacral vertebra 

 „ „ spiuosus ,, „ „ 



„ corpus of the supposed 10th lumbosacral vertebra 



Width of „ „ ,, „ behind 



Height of „ „ „ „ ,, 



Length of processus transversi of the supposed 10th lumbosacral ver 

 tebra, behind .... 



„ processus spinosus of the supposed 10th lumbosacral vertebr; 

 „ corpus of 1st caudal vertebra 



Width of „ ,, behind 



Height of „ „ ... 



Length of processus transversi of 1st caudal vertebra 



Distance bet^veen the outer edges of processus obliqui of 6th caudal 

 vertebra .... 



Distance between the outer edges of processus obliqui of 9th caudal 

 vertebra ...... 



Length of sternum ..... 



Width of „ between the points of the lateral processes 



Length along the curve on the outer side of the supposed 2nd pair rib; 



Width of the supposed 2nd pair of ribs at upper bend 



Length along the curve on outer side of the supposed 6th pair ribs 



Width of the supposed 6th pair ribs at upper bend 



Length of scapula 



Width „ ... 



Length of humerus 



Width „ at lower end 



Length of radius in a straight Hue 



Width „ at middle 



Length of ulna, in a straight line between the articular surfaces 



Width ,, at middle .... 



r 



2-' 



r 



2" 





9i' 





lOi' 





8i' 



1' 



i" 



r 



2i' 





9i' 





iir 





91' 





10" 



4i" 





3n' 





111' 



1' 



?" 



5' 







4J' 



7' 



5" 





4r 



2' 



61' 



3' 



6i' 



1' 



gi- 





Hi- 



2' 



s'' 





7" 



2' 



2^" 





4" 



The skeleton is not that of a very old, nor of a very young whale. The vertebral epiphyses 

 are loose from the 3rd dorsal vertebra inclusive to the 2nd lumbosacral vertebra. They are, with 

 the exception of the 6th lumbosacral vertebra, united on the more posterior vertebrae, also on the 

 cervical and the 1st dorsal vertebræ. 



In comparing these measurements with those of the preceding species, we find that this 

 Balænoptera has very strongly developed bones. Its scapula and ribs are large compared with 

 the size of the skeleton. It is most particularly distinguished, however, by the short, stout, and 

 but slightly curved lower jawbones, on which the processus coronoideus is rudimentary. We 

 find, from given measurements of other whales, that the length of the lower jaw, along the 

 curve, is not smaller than that of the skull in a straight line, but, on the contrary, larger. We 

 may, therefore, estimate that this whale had a skull about 8' long. As the entire skeleton would 

 undoubtedly have been at least 45' long, the measurement of the length of the skull, relative 

 to the length of the skeleton, shows that it had a head considerably smaller than any of the pre- 

 ceding species, of which the length of the skeleton was known with certainty. As regards the 

 form of the skull it is of course unknown ; but the inconsiderable curve of the lower jawbones, in 



