1891-92.] Prof. Sir Wm. Turner on the Lesser Rorqual. 
69 
the lower jaw with the articular surface of the temporal bone was 8 
inches in length and 10 inches in transverse diameter. 
The hyoid apparatus was present both in the Granton and Dunbar 
specimens. In the Granton specimen the transverse diameter 
between the tips of the great horns was 20J inches ; in the Dunbar 
specimen it was 20 inches. In the Granton specimen the diameter 
from the tip of the anterior horn to the posterior border was inches; 
in the Dunbar specimen it was 7J inches. The length of the stylo- 
hyoid in the Granton specimen was 11^ inches; in the Dunbar specimen 
it was 1 1 J inches. Compared with the hyoid of Balcenoptera borealis, 
a description of which I have given in my account of that whale,* 
it will be seen that in the latter animal the hyoid was a somewhat 
larger bone ; it differed also in the shape of the body, which in B. 
rostrata was convex from side to side and from before backwards on 
the inferior surface, whilst the great horn was fusiform in its long 
axis and not so flattened on its inferior surface as in B. borealis. 
The general shape of the hyoid in B. rostrata approximated, indeed, 
more to that of B. sibbaldii, though on a much smaller scale. 
The length of the tympanic bone in the Granton specimen was 
inches, the breadth was If inches. 
Anterior Extremity. — The integument, the subjacent muscles, and 
other soft parts, together with the periosteum, were carefully removed 
from the bones of the limb, so that the carpal bones and joints and 
the digits might be seen and described in situ. The Scapula had 
the customary shape of the species, and possessed both coracoid and 
acromion processes. Its extreme antero-posterior diameter was 30 
inches, whilst its breadth from the vertebral border to the middle of 
the inner border of the glenoid fossa was 16 inches. In Knox’s 
young specimen the coracoid process, and about one-half of the 
acromion, consisted of unossified cartilage ; the vertebral border was 
also cartilaginous, and at both the anterior and posterior angles, 
especially the latter, considerable plates of cartilage were still present. 
The Humerus also had the form of the species. It was Ilf inches 
long and nearly 6 inches broad in the middle of the shaft. The 
head was elongated and encrusted with articular cartilage. The 
opposite end had broad articular areas for radius and ulna. The 
* Proc. Roy. Soc. Edin., Feb. 1882, and Jour, of Anat. and Phys., April 
1882. 
