1891 - 92 .] Prof. Sir Wm. Turner on the Lesser Eorqual. 
53 
surface by a constriction that it was not until this portion of the 
stomach was opened into, that I could feel quite certain about it. 
When tlie opening was made it was seen that the 2nd compartment 
communicated by an orifice, through which all the digits could be 
passed, with this 3rd compartment. One boundary of this orifice 
was the dorsal wall of the stomach, and the other was the free 
crescentic edge of the septum between compartments 2 and 3. 
The 3rd compartment extended across the stomach from the 
dorsal to the ventral wall ; its superficial area, corresponding to that 
of the right end of the 2nd compartment, was about 12 inches in 
greatest diameter ; but in the direction of the longitudinal axis of 
the stomach, the diameter of the compartment was apparently not 
more than from 1 to 2 inches. Its aperture of communication with 
the 4th compartment was next the ventral wall, and readily admitted 
the fingers and thumb ; and as the opening into the 2nd compart- 
ment was next the dorsal wall, the food passing through the 3rd com- 
partment had to traverse its greater diameter before it could reach 
the 4th. 
The 4th compartment was inclined forwards towards the diaphragm. 
It was 2 feet 4 inches in its long diameter, which curved from left 
to right, and formed the posterior border of this part of the stomach. 
It was much wider about the middle of its length than at its two 
ends, and its greatest girth was 4 feet 1 inch. When opened into, 
the mucous lining was seen to be smooth. It was separated from 
the dilatation situated to its right by a deep constriction externally, 
corresponding to which, in the interior of the organ, was a broad 
septum attached around its periphery to the wall of the stomach. 
The aperture of communication between the 4th compartment 
and the succeeding dilatation was not, therefore, at the periphery of 
the septum, as was the case with all the preceding septal openings, 
but was to the right side of the centre of the septum. The 
opening was not more than 1 inch in diameter and was valvular, 
and the flap next the dilatation, which was crescentic in shape, over- 
lapped that which lay next the 4th compartment. From the small 
size of this opening as compared with the other septal aper- 
tures, the passage of the food into the dilatation must have been 
much slower than between the other compartments of the stomach, 
so that the retention of the food in these compartments sufficiently 
