61 
cut in transverse section. No mucous membrane is 
recognisable, and the whole wall is filled up with roundish 
bodies, each of which appears on examination with a 
moderately low power to be filled up with a homogeneous 
material. These bodies are closely packed together, and 
between them lie a few connective tissue fibres. Some 
masses of disintegrated tissue lay between the folds which 
may possibly have represented the disintegrated mucosa. 
Fig. 3 represents a small portion of the same section under 
a much higher magnification. Outside of all may be seen 
a layer of peritoneum (/’e7.) and internal to this is a thin 
longitudinal layer of plain muscle fibre (J//.). Within 
this layer of longitudinal muscle fibres is a layer of 
eireular fibres (J/.¢.), also unstriated and about three 
times the thickness of the former layer. Within this, 
again is a layer of loose areolar tissue (S. muc.) from which 
fibres pass through the thickness of the wall of the 
intestine between the spherical bodies. 
The arrangement of the muscle layer is therefore 
normal, and the foreign structures lie in the sub-mucosa. 
Of the mucosa itself there is no definite trace. A delicate 
sheet of connective tissue covers the free surface of the 
folds. This is easily torn, and the little spherical bodies 
can be readily dissociated. ‘They are perfectly spherical 
in the fresh state, and have an average diameter of about 
0G mm. The structure of a portion of one of these cysts 
is shown in Fig. 5. There is a capsule (C.c.), consisting 
of an outer cuticular layer and an inner irregular layer, 
which is fibrous in appearance, and apparently contains no 
nuclei. Within this capsule the cyst is filled up by a 
vast number of minute spore-like bodies. These are oval 
in shape. They have a maximum diameter of about 5 #. 
They do not stain, and present no obvious internal 
structure. 
