— 117 — 



The whole bone presents, besides the excrescences marked in the illu- 

 stration, a convex frontal surface, and a concave back-surface; the maximum 

 length, measured along the front-surface of the bone amounts to 168 c.M., 

 whilst the distance between the extremities of the big cornua is not more 

 than 140 c.M., in consequence of the fact that these cornua have a back- 

 and downward direction. These horns are not quite round but somewhat 

 compressed in the antero-posterior direction. Like the upturned lesser cornua 

 they display rough extremities for the attachment of cartilage. 



The styloidean or styloid process (fig. 10) is a small separate bone, cur- 

 ved and flat, measuring 72 c.M. in length and 23 c.M. in breadth. Both ends 

 are rough for the attachment of cartilage, by means of which it is connected 

 below with the ascending small cornua of the hyoides, and above to that 

 part of the cranium corresponding to the processus mastoideus, or nippleshaped 

 process of the temporale. To what extent this bone of the Buitenzorg skeleton 

 is congruous to that of Balaenoptera musculus L., which in contradistinction 

 to the other European Balaenopteridae is also described as flat, can not here 

 be stated, seeing that I have no drawing of the processus styloideus of Balaenop- 

 tera musculus L. However a similar bone, described as „stylo-hyal" is repro- 

 duced by Flower (4) p. 406, from a Java finner, Balaenoptera schlegelii. The 

 latter bone is however shorter and broader than that of the Buitenzorg skeleton. 



The vertebrae fig. 11 — 32. The vertebrae consist of light spongy 

 bone, more so than is the case with the other parts of the skeleton. They 

 moreover show in various places apertures for the egress of bloodvessels in 

 which the spongy material of the vertebral body is very rich. The surface of 

 the body serves for the attachment of ligaments and accordingly presents a 

 rough, porous structure; the ligaments are indeed astonishingly strong, except 

 in the cervical part of the spine, where they seemed to me less powerful. 



The greater part of the osseous anterior and posterior epiphyses are not 

 completely incorporated with the bodies or centra, but exist frequently as 

 separate plates of bone. 



The total number of vertebrae amounts to 65, distributed as follows: 



cervical vertebrae 7 



dorsal vertebrae 16 



lumbar vertebrae 15 



caudal vertebrae 27 



