16 W. LlLLJEBORG, 



that the Balaena biscayensis, or Biscay-Whale ESCHRICHT belongs also to 

 this genus 



ESCHEICHTIUS ROBUSTUS (Lilljeborg). 



Balaenoptera robusta, LlLLJEBORG. Ofversigt af Skandinaviens Hvalcljur, p. 77. 

 JEschrichtius robustus, J. Gray. Catalogue &c. p. 133. 



In our work "Ofversigt af Skandinaviens Hvalcljur", printed in Upp- 

 sala Universitets Arsskrift for 1861 and 1862, we have given an account 

 of such bones of this whale as have been discovered, but we consider that 

 we ought to repeat that list before passing to a description of those bones. 

 The bones found are: 



The two lower jaw-bones. 

 4 cervical vertebrae: 1 st , 3 rd , 4* and 6 th . 



7 dorsal vertebrae: I s *, 3 rd , 5 th , 6 th , 7 th , probably the 13 th and one 

 of 9th_iith. 



8 lumbosacral vertebrae: probably 1 st , 2 nd , 3 rd , 5 th , 6 th , 9*, 10 th 

 and llth. 



14 caudal vertebrae: probably 1 st , 2» d , 4 th , 6 th , 9 th , 11 th — 17 th , 19* 



and 20*. 

 4 processus spinosi inferiores. 



1 processus transversus, which probably belonged to the 4* lumbo- 

 sacral vertebra. 

 The right bladebone. 

 The left humerus. 

 The right ossa antibrachii. 



6 carpal bones. 



4 metacarpal bones. 



4 finger-bones. 



One of the cornua anteriora of the os hyoideura. 

 The sternum. 



22 ribs, some imperfect, 12 belonging tho the right and 10 to the left 

 side. 16 belong to 8 pairs i. e. are fellows. On the left side from 

 the 11* to the 14* both inclusive, and on the right side the 3 rd 

 and 15* ribs are missing. 



The lower jaw-bones (PI I. figg. 1 — 4) furnishes one of the most im- 

 portant characteristics of this Whale. There is no other known Balaenop- 

 terid in which they have the same form. That which particularly distin- 



