60 
lying close together, and shining through the peritoneum. 
The fresh intestine was precisely similar to that of the 
second specimen, which is represented in Plate D, fig. 1. 
On cutting open a portion of the gut it was seen to have a 
much reduced lumen. The wall was 3 or 4 mm. thick. 
Its internal surface was thrown into close set and deep 
longitudinal folds pursuing a zigzag course. All the 
surface of these showed the same round white bodies pro- 
jecting from their surfaces. 
The stomach was normal in form and relations except 
that its walls seemed thinner than usual. No food con- 
tents were present. In the modified portion of the intes- 
tine there were traces of decomposed food matter. A few 
fragments of Lamellibranch shells were found, and were 
identified as young Donaa vittatus. 
The second specimen, sent by Mr. Scott, was the 
intestine of a female plaice 11 inches long. It had been 
preserved in corrosive-acetic fixative before reaching here. 
From Mr. Scott's description the fish seems to have been 
quite normal in other respects. The ovaries were of 
normal size and relationships. 
Almost the entire post-pyloric portion of the intestine 
in this specimen was modified in precisely the same way 
as in the other case described above. Fig. 1 represents a 
portion of the intestine of this fish. ‘The maximum 
diameter was about 1 inch. This thickest portion lay 
immediately behind the stomach. The pyloric caeca could 
be recognised, but were greatly flattened out. Near the 
anus the inclusions in the wall became fewer, and a small 
portion was free from them. No traces of food matter 
could be recognised in the lumen. 
Pieces of both intestines were hardened in alcohol, 
embedded in paraftin, and sections were made. Fig. 2 
represents a small portion of the wall of the first specimen 
