278 LILLJEBORG ON THE 



5. B. RoBUSTA, LiUjehorg. Gniso-Whale. 



Processus coronoideus of the loicer jaw low and liarcVy perceptible. Ribs at least 15 pairs. 

 Vertebræ about 60. None of the cervical xiertebræ succeeding the axis have the lateral processes 

 forming a ring} 



Balænoptera kobusta, LiUjehorg. Foredrag vid Naturfovsk. -Motet i Kopenliamm, 

 1860 ; Foih. p. 602. 



Note. — I have not seen any description that can rightly be applied to this species, which differs, 

 in several respects, from all other known species of the genus Balænoptera, and presents an approach to 

 the genus Balæna. It differs, however, from the latter genus, in the very inconsiderable curve of the 

 lower jaw-bones, the strongly developed and moveable cervical vertebræ, the longer corpora and shorter 

 lateral processes of the lumbo-sacral vertebræ, and by the sternum having a long rounded process 

 behind, and large winglike lateral processes in front. It shows an approximation to the genus Balæna, 

 by the slight development of the processus coronoideus, and the fully developed tuberculum, collum, and 

 capitulum of some of the ribs, also by the processus obliqui of the anterior caudal vertebræ being 

 directed more towards the sides. It differs from the genus Megaptera by the strongly developed 

 acromion and processus coracoideus of the shoulder-blade. It approaches, by the numerous vertebræ 

 and the elongated form of body, to the division of genus Balænoptera that Eschricht calls " Kæmpehvaler," 

 and to which the three first-described Balænopteræ belong. As I have not been able to obtain 

 knowledge of the entire skeleton, but only of a part of it — a great part, however — which was dug up 

 in a field on Graso (Grassisle), in Eoslagen, Upland (Sweden), I can give only an approximate 

 number of the missing vertebræ and ribs, and a description of the form of the missing parts only from 

 the contiguous bones that were actually found. 



The bones found in the above-mentioned field are, both the lower jawbones; the 1st, 3rd, 4th, 

 and 6th cervical vertebræ ; 7 dorsal vertebræ, viz., 1st, 3rd, 5th, 6th, 7th, and of the other two, one 

 is probably the 13th, and the other one of the 9th — 11th; 8 kimbosacral vertebræ,^ probably the 

 1st, 2nd, 3rd, 5th, 6th, 9th, 10th, and 11th; 14 caudal vertebræ, probably the 1st, 2nd, 4th, 6th, 

 9th, 11th — 17th, 19th, and 20th; 4 processus spinosi inferiores and 1 processus transversus, 

 which probably belonged to the 4th lumbosacral vertebra ; some pieces of the processus transversi 

 of a cervical vertebra ; the right scapula ; the left humerus ; the right lower arm-bones ; 6 carpal 

 bones, 4 metacarpal bones; 4 finger-bones ; 1 of the cornua anteriora of the lingual bone; the 

 sternum, and 22 ribs, some of which are incomplete, 12 belonging to the right and 10 to the 



^ At least the 3rd, 4th, and 6th cervical vertebræ. 

 In the above-quoted report of the meeting of Naturalists, I have made a statement that differs 

 somewhat from this, in regard to the lumbosacral and caudal vertebræ, and which may now, after 

 renewed comparison, be corrected. The differences consist in the 9th lumbar vertebra having been 

 considered as the 7th, the 10th as the 8th, and the 11th as the 9th; in the 1st and 2cd caudal 

 vertebræ having been mentioned as the 13th and 14th lumbosacral vertebræ, the 4th caudal as the 3rd, 

 the 6th as the 5th, and the 9th as the 8tli ; and in the 10th having been stated as found, and the 17th 

 having been excluded. 



