of Edinburgh, Session 1869-70. 35 
the rocks and shoals, where it was left as the tide receded. The 
length of the animal, measured from the tip of the lower jaw to 
the end of the tail, 78 feet 9 inches. The girth of the body imme¬ 
diately behind the flipper was 45 feet. Its girth in line with the 
anal orifice was 28 feet, whilst around the root of the tail it was 
only 7 feet 6 inches. The inner surface of the lower jaw, close to 
its upper aud outer border, was concave, and sloped inwards so as 
to admit the edge of the upper jaw within it. The lower jaw 
projected at the tip 1^- foot beyond the upper. The length from 
the angle of the mouth to the tip of the lower jaw, along the 
upper curved border, was 21 feet 8 inches. The dorsum of the 
upper jaw was not arched in the antero-posterior direction. It 
sloped gently upwards and backwards to the blow holes, from 
which a low but readily recognised median ridge passed forwards 
on the beak, gradually subsiding some distance behind its tip. 
On each side of this ridge was a shallow concavity. Immediately 
in front of the blow holes the ridge bifurcated, and the forks passed 
backwards, enclosing the nostrils, and then subsided. The outer- 
borders of the upper jaw were not straight, but extended forward 
from the angle of the mouth for some distance in a gentle curve, 
and then rapidly converging in front, formed a, somewhat pointed 
tip. Their rounded palatal edge fitted within the arch of the 
lower jaw. The transverse diameter of the upper jaw over its 
dorsum, between the angles of the mouth, was 13 feet 3 inches. 
From the blow holes the outline of the back, curved upwards and 
backwards, was uniformly smooth and rounded, and for a consider¬ 
able distance presented no dorsal mesial ridge. From the tip of 
the lower jaw to the anterior border of the dorsal tin the measure¬ 
ment was 59 feet 3 inches. This fin had a falcate posterior border. 
Behind the dorsal fin the sides of the animal sloped rapidly down¬ 
wards to the ventral surface, so that the dorsal and ventral mesial 
lines were clearly marked, and the sides tapered off to the tail. 
The ventral surface of the throat, and the sides and ventral surface 
of the chest and belly, were marked by numerous longitudinal 
ridges and furrows. When he first saw the animal, the furrows 
separating the ridges were not more than from J to f- inch broad, 
whilst the ridges themselves were in many places 4 inches in 
breadth, but as the body began to swell by the formation of gas 
