called “ SteypireySr”’ by the Icelanders. 331 
Physalus section are no less strikingly developed. _ Especially 
the orbital process of the frontal presents exactly the form pe- 
culiar to this section, being not only very short in the trans- 
verse direction of the head, but also nearly twice as broad near 
its base as along its external border, tapering therefore very much 
in an outward direction. The same is the case with the nasal 
bones, of which a figure nine times diminished is given beneath 
(fig. 3), though, indeed, in a point of minor importance they 
Fig. 3. 
Nasals. 
appear to deviate a little from those of Balenoptera antiquo- 
rum, the only species of this section in which they have hitherto 
been described and figured with accuracy. They are rather 
short, and deeply hollowed on the anterior edge and anterior 
part of their superior surface, so that an obtuse ridge is formed 
along the middle line, projecting forwards in a roundish point, 
as inthe species just mentioned ; but at the sametime there 1s less 
difference in their breadth before and behind than in the latter. 
The hyoid, finally, indicates the same section, as will be seen 
