the constricting area being at the level of the intermuscular space. The contents 
are rich in degenerated erythrocytes and a few pigmented mononuclears. A large 
pigmented giant cell is situated alongside a longitudinal section of the head of a 
worm. The walls are infiltrated almost exclusively with small round cells and 
some mononuclears. The vessels in the neighbourhood are filled with erythrocytes 
and mononucleated leucocytes. The infiltration in the subperitoneal space is not 
intense and consists of mononuclears and a few small round cells. Minute traces 
of pigment are observed in many of the leucocytes collected about the small veins S 
no pigmented cells are seen inside the vessels. 
Cord-like tumour with small necrotic -patch in mucous membrane. 
It was found impossible to cut out the mass from the wall of the caecum without 
dividing a cyst in the subperitoneum. A small immature female oesophagostome was 
drawn out. Section of wall was 24 mm. long, the tumours occupied 20 mm. The 
submucosal tumour consists of a series of cysts occurring in a group of three small 
submucosal cysts lying alongside one another, a fourth and larger cyst occupying 
the entire submucosal space, a fifth cyst in the internal and external muscular coats, 
a sixth and minute one in the submucosa, the seventh being a slightly larger one in 
the submucosa and involving some fibres of the internal muscular coat. On the 
peritoneal side of the section is seen the subperitoneal cyst divided, and near at 
hand, a dark brown mass occurring in the loose tissues of the subperitoneum. 
The contents of the group of three tumours vary considerably. The outer cyst 
is composed almost entirely of mononuclear leucocytes and a few pigment cells. A 
diagonal section of a worm contains a few mononuclears. The outer half of the 
adjoining walls are infiltrated with eosinophiles. The second cyst contains a 
number of partially degenerated erythrocytes and some large mononuclear and 
pigmented leucocytes, the transverse section of the worm showing that there are 
many erythrocytes in the intestine, and slight pigmentation of some of the cells 
lining the gut; the walls are infiltrated with many more mononuclear leucocytes 
than the first cyst, and contain many eosinophiles; pigmented mononuclears are seen 
traversing the muscular coat. 
The two cysts lie very close together and do not distend the submucosal space. 
The third cyst contains no worm, and its contents consist chiefly of polymorpho¬ 
nuclear leucocytes and a few large pigmented mononuclears, and, in the wall next 
to the fourth or larger cyst, are several large peripherally pigmented giant cells. 
The tissues of this wall are necrotic, especially the outer ones, a condition due to the 
extensive necrotic condition of the fourth cyst. The infiltration is particular y 
intense about the wall adjacent to the internal muscular coat. 
The fourth cyst contains two cross sections of a worm and exhibits all the 
characters of an abscess, l’us cells are numerous; many Gram-positive cocci and 
short bacilli are present in the cyst and also in the intestine of the worm. The walls 
are necrotic and the necrosis extends to the mucosa, where there is a small necrotic 
ulcer. The infiltration of mononuclear and polynuclear leucocytes is very extensive, 
and part ot it extends to the fifth cyst, which is situated in the two adjoining halves 
of the internal and external muscular coats. The number of eosinophiles present is 
scanty, and no pigment or erythrocytes can be seen. 
The fifth cyst occupies the outer half of the internal and the inner half ot the 
external muscular coat. The cavity is small, and is filled with mononuclears and a 
few large polygonal non-pigmented nucleated cells. A cross-section of a worm 
contains only mononuclear cells. The muscular walls of the cyst are moderate y 
infiltrated with mononuclear, small round cells and a few eosinophiles. 
The sixth cyst is a minute one in the middle of the submucosa. It is free on 
all sides, and does not exhibit any great infiltration of the cyst walls. Red bloo 
cells, many of them well preserved, a scanty number of mononuclears, free pigment 
granules, and a few pigmented leucocytes comprise the contents of this cy st. - cross 
section of a small worm contains hardly any blood cells. The connective tissue o 
