214 DR. J. MURIE ON THE ANATOMY [Feb. 14, 
monary artery and aorta ; longer above than below, on account of the 
divarication of these vessels. Length of its upper border 33", of the 
lower 2!; circumference 7". Its canal was sufficiently closed to 
prevent the passage of blood, by reason of the elasticity of the walls ; 
but a probe the thickness of a quill could be pushed through the 
entire distance. 
The kidneys, lobulated, had each lobule averaging the size of a 
plum. One kidney was 60 inches long by 17 broad, the other 
66 inches by 15, both elongated and oval-shaped, their extremities 
decreasing to a transverse diameter of 8 inches. 
As is usual in Cetacea, the penis was conical; and when we exa- 
mined the animal, it was not retracted, but hung loosely from the 
abdomen. In length it was 48 inches; at its widest, circumference 
25 inches, tapering to less than two at the point. At this last the 
termination of the canal of the urethra opened rather on the under 
surface (fig. 34); the opening was crescentic, with the horns for- 
wards, and on the roof a slightly depending ridge of mucous mem- 
brane. Behind this, at the distance of 13 inch, existed a second 
opening into the urethra (fig. 3a), subcircular in form, nearly 
equal in size to the first, and with indented edges. Around this, for 
almost the size of a shilling piece, the cuticle exhibited a minute 
linear-rayed appearance, not unlike certain forms of cicatrices. From 
the internal lining of the opposite surface of the mucous membrane 
a nipple-like process protruded, dividing the canal as it were into 
two passages. ‘This projection appeared to be part of a longitudi- 
nal ridge of the mucous membrane, extending along the roof of the 
canal of the urethra. 
Fig. 3. 
Whether this very unusual second perforation of the urethra was 
normal, or only the result of injury or of pathological origin, I will 
