Miscellaneous. 485 
contained a large quantity of sanguinolent matter, and the annular 
folds of the vagina, which represent a more or less perfect os utert, 
were scarcely indicated. The mamme are at least 1:15 m. long, 
with a maximum breadth of 0-22 m., and are only a few centimetres 
thick; each of them is traversed by a longitudinal duct, which 
commences abruptly about 10 cm. from the anterior extremity, and 
continues, without greatly increasing its calibre, as far as the 
reservoir situated beneath the teat; besides this two large lateral 
ducts open into this reservoir, which is of comparatively small size. 
The milk is yellowish white, of the consistency of cream; it has an 
agreeable nutty flavour. The mamme are covered throughout their 
entire length by a layer of the cutaneous muscle; this layer must 
be the most active agent in the phenomena of compression which 
produce the emission of the milk; in front it acts chiefly by means 
of its external aponeuroses, which are here almost the only covering 
of the mamma; posteriorly the muscle itself is applied directly to 
the gland. The cutaneous muscle is elsewhere very well developed, 
and in several regions of the flanks exceeds 4 cm. in thickness. In 
front it covers at certain points the prolongations which are sent off, 
to a distance of 1 m. behind the junction of the lips, by the spongy 
and largely areolar tissue, which contains the spermaceti oil in 
abundance. 
The stomach is composed of ten successive chambers. The 
capacity of the first is nearly equal to that of the nine other cham- 
bers; its mucous membrane is covered with convolutions which 
are grouped round three perfectly distinct centres. The nine 
subsequent chambers form a mammillated mass, which is very 
sharply separated from the first; they are separated from one 
another by perforated septa, which were described a long time ago ; 
the first is at the most as large as the fist, the last, on the other 
hand, is of enormous size. In the duodenal dilatation, which is 
greatly developed, we observe a little ampulliform swelling at the 
orifice of the hepato-pancreatic duct ; besides this it presents a large 
semi-lunar valvular fold in front of the point where it passes into 
the narrow duodenum. There are a number of little glands at the 
posterior extremity of the rectum, in the immediate vicinity of the 
anus. ‘The liver is divided into two lobes, one of which is situated 
to the right, the other to the left; to the right lobe is attached a 
small dorsal one. 
The aortic trunk is greatly swollen at its exit from the heart ; 
immediately above the sigmoid valves it gives rise to two coronary 
arteries, and exhibits, besides, a perforated ductus arteriosus which 
brings it into connexion with the pulmonary artery. The thoracie 
plexuses are much less developed than those of the Delphinide, but 
more so than those of the Mysticetes. Instead of extending to the 
further end of the thoracic chamber, the network terminates 
posteriorly at the level of the sixth rib. The plexus of the right side, 
which alone I was able to examine, is traversed, a short distance 
