Sperm Whale and other Cetaceans. 151 
mucous membrane were wholly longitudinal and not abundant. 
One narrow Peyer's patch, 8 inches in length, was found 
below the middle of the intestine, and two smaller ones higher 
up; they were not strongly marked, though the follicles were 
distinct ; no other appearances of glands, except in the rectum, 
where they were very numerous though minute. The dif- 
ference in length and structure of the intestine in this specimen 
and the last, was very remarkable. ` 
The hepatic duct opened, as usual in the cetacea, into the 
dilated portion of the duodenum, two lines only from its com- 
mencement, and not near its termination, as stated by G- 
Cuvier; neither was there any dilatation of the duct in its 
passage through the parietes of the intestine, as described by 
him, or rather by Duvernoy, in the common dolphin. (Anat. 
Comp. vol. iv. part 9d, p. 531.) The hepatic veins were 
large. The umbilical vein opened largely into the vena porte, 
but the opening into the general venous system was not found. 
No dilatation of the vena ports: near to the liver was observed, 
as has been described in the dolphin. ! 
The heart, which is generally described as semilunar, had 
ks apex quite marked, contrasting strongly with the whale’s, 
as 1 did also with regard to the muscular columns, which were 
not strongly developed in any of the cavities. The fossa ovalis 
was quite marked, at the bottom of which was an exceedingly 
delicate membrane, and at the upper part of this, was the 
foramen ovale, which seemed quite small; the ductus arteri- 
asus, also, was small. 
, The aorta, which was not dilated, as some have described 
It in the dolphin, sent off two vessels from the arch close 
^ The right gave, first, a large branch, whieh was 
ow as the superior intercostal, and yet the recürrent 
ich of the par vagum passed around it, as if it had been the 
of Vian ; secondly, a large branch which entered the base 
the skull, and may be called the internal carotid ; thirdly, a 
smaller branch, which also passed up the neck, and 
may be called the external carotid ; fourthly, a large trunk, 
