94 Mr. Home’s Observations on the Structure 
The structure of the stomach of one species of whale was 
not new to me, having twenty years ago assisted Mr. Hunter 
in dissecting the piked whale, but at that time I only viewed 
the different parts of its structure with the eye of a common 
observer, while now my mind was particularly directed to the 
peculiarities of the stomach. In this examination I discovered 
a resemblance between the second, third, and fourth cavities 
in the whale, and the two portions of the fourth cavity in 
the bullock and camel, which appears to throw some light 
upon the uses of those parts, as well as upon digestion in 
general. 
As in the former Paper a particular description was given 
of the stomach of the bullock and camel, as examples of ru- 
minants with and without horns, it will be proper here to 
describe the stomach of the bottle-nose porpoise, as an ex- 
ample of the whale tribe. 
In the bottle-nose porpoise the oesophagus is very wide, 
has a number of longitudinal folds, and is lined with a strong 
white cuticle, which is continued over the internal surface of 
the first stomach. 
The first stomach lies in the direction of the oesophagus, 
which is continued into it, there being no contraction to mark 
its origin. It is of an oval form, and bears a strong resemblance 
in shape to a Florence flask. The cavity is 15 inches in length, 
and 9 in diameter. The internal surface has a very corru- 
gated appearance, and its cuticular covering is thick and strong. 
The coats of the cavity are firm, and its bottom is surrounded 
by a strong muscular covering. 
The orifice, which leads to the second stomach, is at right 
angles to the cavity, and is situated a little way below the 
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